I had a bankruptcy in 1999...and am finally having some success in getting my scores in the good range.
Basically I had to come up with a plan. I paid off the most recent collections....ignored the really old ones, like older than three years since they will fall off after seven.
I opened to two credit card accounts, Orchard and Household bank, and paid them consistently. Every month my score inched up.
And I have two car loans, one which I paid off last year and one which is still open. Basically I went from scores, 550 Ex, 573 (EQ), and 563 (TU) to 660 Ex, 657 and 616 (TU) over a period of about a year.......when I started really working on my credit seriously.