Improve your credit score

How to judge a good credit reporting service?

I just recently paid off something from them and i have never had any credit at all. my score was 604 eq 620 tu 620 experian.. How much would it go up since i paid them off any help would be awesome. I plan on buying a house.. and planning on getting married.. What would be something that will improve my score

So I am looking at doing a Pay to Delete Letter. There is the original creditor which has a bunch of negative payment information on my credit. Plus it has been sent to collections as well.
My questions:
With the Pay for Delete letter, who do I send it to? The collection agency or the original creditor?
Also, will this letter take care of both the original creditor's negative information and collection agency too?

I am purchasing a home and need a 640 to qualify for programs. Should I pay to see my current scores? The ones that are showing are from June, 2014.

I have four credit cards with balances. None are maxed out. Two with larger balances and two with smaller balances. I can only pay off two with the smaller balances or one with the larger balance leaving three outstanding. Would I raise my credit score faster if I pay off the two with the smaller balances or would it be better for my credit score to pay off one of the larger ones?

what are good, easy, and/or fast ways to improve credit? i used to be financially irresponsible so my credit score isnt yet where it should be.. any advice?

Can I get approved for a loan to pay child support?

What’s the Best Credit Score?

Raising credit score?

How Credit Score Calculated?