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What are the negative items, and are the accounts still open, or are they now closed?
Send a GW letter to each.
http://ficoforums.myfico.com/t5/Rebuilding-Your-Credit/Sample-GW-letters/m-p/617352#M91952
There is a search feature. I typed in "Sample GW" and it found these. You may want to do a more specific search to find more samples that are closer to your set of circumstances.
Welcome to the forums!
I'd suggest reading the following:
Common Abbreviations
Credit Scoring 101 - great for knowing what is in your credit score and to see how your score is impacted.
What Steps Do I Take - great for learning the repair process.
and Example letters - PFDs, GWs, DVs, etc.