In a year of asking experts credit card advice, these are the 5 things they agree on

When it comes to personal finance advice, credit card experts have a lot to offer.

In our research and interviews over the past year, Select has come across dozens of people who have tips to pass on to the next generation of credit card users.

From experts at the three main credit bureaus Experian, Equifax and TransUnion, to credit users with perfect scores, certified financial planners and personal finance book authors, we have heard all sorts of tips and tricks about how to use credit cards responsibly. And while some advice differs, it all comes down to knowing your own money habits and sticking to a few tried-and-true basics.

Below, we rounded up some of our favorite advice that is, more or less, universally agreed-upon.

In a year of asking experts their credit advice, here are five things they can agree on.

With credit card bills becoming the biggest source of debt for millennials, it's important now more than ever that cardholders know what they can and cannot afford before charging any purchases onto their credit cards.

"I've always said that credit cards aren't for everyone," says Rod Griffin, Experian's senior director of consumer education and advocacy. Whereas some people manage money just fine using credit then paying it off, others might prefer paying in cash or on a debit card so it's easier to stay on track.

For Jim Droske, who has a perfect credit score, he credits his good score to never spending more than he normally would just because he has the flexibility of paying with credit.

Credit cards make it easy to charge more than you can afford, which can lead to bigger financial problems down the road. This doesn't just hurt your wallet but your overall access to credit.

Cardholders should make a spreadsheet each month that can help them track what gets charged onto their credit card and other expenses, argues Beverly Anderson, president of global consumer solutions at Equifax.

"A consumer should look at how much they're making and what they're spending. Knowing exactly where you stand and what you can afford may help you better manage financial commitments."

In fact, Anderson says that not having a budget is one of the top reasons people get into credit card debt.

Droske, who is president of Illinois Credit Services, a credit counseling company, has long been obsessed with tracking his credit score.

"The more you pay attention to it, the better your credit tends to be," Droske says.

While you can go days without checking your score, it's important to monitor it every now and then, and especially to see how changes in your credit report make an impact.

Consider signing up for a credit monitoring service that helps you track updates to your credit report in real time. Select ranked our favorite picks and two that made the list for their zero-cost services include CreditWise® from Capital One and Experian free credit monitoring.

You should especially pay attention if you use a credit card for all your purchases. Keeping a high credit card balance on your card raises your credit utilization increases and eats away at your credit limit. The higher your utilization rate, the more damage to your credit score. Lenders and creditors generally prefer to see a utilization rate of under 30%, and it's even better to shoot for the lowest percentage possible (less than 10%) to get the best credit score.

Experts agree that the most important factor in your credit score is your payment history. Making on-time payments each month is crucial to achieving a healthy credit profile.

In fact, both FICO and VantageScore list payment history as the top factor in calculating your credit score, since paying your bills on time demonstrates that you pose a lower credit risk to lenders. 

And the numbers back this up as well: About 98% of "FICO High Achievers" have zero missed payments, according to FICO. And for the small 2% who do, the missed payment happened, on average, approximately four years ago.

Ensure you are making on-time payments, whether it's the full amount of your balance or the minimum payment.

When it comes to applying for a new credit card, Droske recommends not chasing the latest and greatest offer.

"There are a lot of different types of offers; you have to find the one that fits your lifestyle and fits your needs the most," Droske says. "If you travel a lot, then that totally makes sense. But if you don't, there may be other rewards cards that you're going to benefit from more just by the way you use it."

Because Droske himself doesn't travel enough to really justify having (and paying for) a travel rewards card, he is wary to recommend them for everyone despite their popularity.

Look instead at where you spend the bulk of your money. There are credit cards geared toward grocery shopping and gas expenses that may be worth more to you. There are also simple-to-use cash-back credit cards.

For example, the Citi Double Cash® Card is a flat-rate card with no annual fee that rewards you for spending and paying your bill on-time. Cardmembers earn 2% on every purchase with unlimited 1% cash back when you buy, plus an additional 1% as you pay for those purchases. Plus, earn 5% total cash back on hotel, car rentals and attractions booked with Citi Travel.

When you can afford to do so, always pay your credit card bill in full so you never carry a balance.

With interest accruing daily, these revolving balances can cause your credit card debt to balloon quickly. And it's not just the large purchases to watch out for, a series of small impulse splurges can also set you back if not immediately paid off.

"For example, let's say you have a $1,400 balance from multiple dinners out and events with friends on a credit card with a 19.99% APR," says Bola Sokunbi, a certified financial education instructor and author of "Clever Girl Finance." "If your minimum payment is $70 a month, it would take you 25 months to pay it off, paying over $300 in interest."

Carrying a balance is also against Droske's number-one rule. "I almost always pay it off in full at the end," he says. His best advice to credit users is to not charge something if you can't pay for it in full.

You can keep your credit card balance low when financing debt or new purchases by using a 0% APR credit card. The Citi Simplicity® Card offers zero interest intro APR for 18 months on balance transfers and zero interest for 18 months on purchases from date of account opening (after that, the variable APR will be 17.49% - 28.24% based on your creditworthiness. Balance transfers must be completed within 4 months of account opening). There is an intro balance transfer fee of 3% of each transfer (minimum $5) completed within the first 4 months of account opening. After that, your fee will be 5% of each transfer (minimum $5). Keep in mind these cards require good to excellent credit to qualify.