Desperate Student with credit card problems. Charge offs.

On campus, 18yo freshman are bombarded by credit card companies and Before I knew i was in some serious debt and stressed out to the max. I know have ruined my credit and at the age of 25 my independent life is just beginning. I actually had to take some time off school b/c of the high stress levels. I am currently back in school, Graduating next year. I would like to buy a home, car ect. However I don't know where to begin on fixing my credit. This summer I did pay off four accounts that had gone to collections but I still have three accounts that are not paid also in collections. How do I get the accounts I paid, off my report? Also, How should i go about paying off the accounts in collections? Should I pay them off? Its been awhile since they were charged Off? Is this too many questions?
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Pay off a couple cards and reopen the same card with the same account number if possible.
Send them upfront goodwill money to do it.
After 1 year your score will leap.