I like using UVLayout from Headus (you can get their demo version for 30 days). For a brief tutorial on how to use it, I'd head here: http://cg.tutsplus.com/tutorials/autodesk-3ds-max/create-a-realistic-looking-mailbox-using-3ds-max-and-uv-layout-day-2/ . He does some layout in max, then swaps over to UVLayout.