Triathelete's guide is really excellent.
This is totally a DIY job, and you can't put a price on getting to know your truck's suspension first hand.

I'd recommend some extended brake lines as well as the springs. It's only a lift of 2" or so, but the extended lines will give you a little more room to play.
Unless you have experience bleeding ABS brake systems, you might want to hand the brake lines over to a shop (should you decide to do the lift yourself).