A few very useful threads that I've reviewed on more than one occasion.
Keyless Tailgate: A must if you have a bed cover http://www.f150forum.com/f38/keyless...73513/index21/
Gotts Mod: Not sold on this one yet. Still looking at possibly adding an AFE stage 2
Boost Bars look real nice on stock bumpers
Pop-Lock - The best out there if you want something that already comes with the wire and pre-fab'd bracket!
A must on the early gen SCrews that dont have the USB inside the console
Great Ideas from here too: