Some finance experts recommend paying off the smallest debt first. This is like just paying off debts within your means. As mentioned above, this won't create much savings for you because it has a snowball effect in the long run. For all you know, a small debt can have an extraordinarily high interest. If your goal is just to get one loan erased from your debts spreadsheet, this will be a good strategy then.
If you want to save the most money possible, it is best to pay your credit card loans with the highest amount you can afford. Your loan balance will be smaller this way and so the interest will be much lower too. Regardless of what experts might advice, it is important to stick with the plan that you can consistently observe until all your debts are erased.