Credit building

Credit building

I have sort of, not good credit due to some previous circumstances. What can I do to start to repair my credit? As in build it back up? I'd rather not get a credit card with an astronomical interest rate, but will more or less do what I have to right now. I have a cell account in good standing at the moment as well as a couple of student loans also in good standing. Are there any good companies out there for people with bad credit to help them re-build it?
Because I have this need to show off :-)

Because I have this need to show off :-)

Pink-Zinnia

Pink-Zinnia

Pictures from my first garden

Pictures from my first garden

Early Morning Treasures

Early Morning Treasures

More Mushroom Stuff

More Mushroom Stuff

This is where the magic happens.

This is where the magic happens.