Answer:
There is no real quick answers to improving credit scores. There are specific things you can do to improve your credit score. Some take time, some are instant.
I recommend the following in order:
Fix errors
Pay your current bills on time
Don't close credit accounts
Keep balances on revolving debt below half of the permitted credit
Say no to new accounts
Stop letting people or companies access your credit
Pay off collections and judgments

I wrote a long article on it which I placed in the related links.
Contributor: Richard
First answer by Richard Hartian. Last edit by Richard Hartian. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 2 [recommend question].