The first thing you can do is to NOT get into more debt...if you can't afford it...don't buy it! Concentrate on paying down your debt, not making it worse.
Try consolidating your debt, so all of what you owe is in one easy to manage place and you won't have to worry about forgetting or letting a part of your debt slip to the land of forgotten debt.
If you don't want to consolidate your debt, pay off your debts one at a time. You can start with paying off the smallest first, or work toward paying off the debt with the highest interest rate first.
Either way, the money has to be paid one way or another.
Oh ya, and DON'T PANIC! Debt is manageable. You just need to determine a plan of action...budget yourself - decide how much you can pay each month and stick to that, pay more when you can afford to.
Cut back on unnecessary expenses - do you buy your lunch at work every day? Stop that! start packing your lunch. Do you hit Starbucks a few times a week for your morning coffee cup? Cut that out! Make coffee at home and take it to work with you in a travel mug. Do you and your friends or your significant other go to dinner and a movie every weekend? Cut back on those types of outings and cook at home and hit up a Redbox.