What lift are you installing? 2.5" or 4" ?
You will not need shims if installed correctly.
You will need new brake lines, as advised. Recommend Stainless braided lines all around.
If your front knuckles are leaking or have not been serviced in a loooong time, now would be a good time to do it, but it will add another two days to the job if you've never done it before. Might be best left for another time so not to overwhelm you.
Good time to paint and otherwise refurbish the axle housings and undercarriage and rid it of mud and other rust-promoting detritus.
And as mentioned, brakes, rotors, drums, etc, if needed.
Bleed brake lines.
You may need extended sway bar links if 4" lift is going in.
Good luck