Backyard frame straightening tips?

[Coronettom]

Hey everyone,
So I was poking around under the truck the other day and discovered the the PO of my truck wasn't entirely truthful with me, evidence is in the slight bend in my frame up front on the passenger side just behind where the bumper bracket bolts up. Must have been smacked pretty good at some point and the PO(also the original owner) didn't mention it. My bad for not checking I suppose. It doesn't appear to be TOO bad so I was wondering if anyone has some tips or tricks they've used to straighten a frame at home?

I figure at this point I don't have much to lose considering it's already bent, I might as well try to fix it myself before being forced to either pay to have it straightened or find another good short bed chassis in my area.

I'll try and get some pics uploaded after work, thanks for reading

Tom