[shiftb]

I use a Wacom tablet instead of a mouse or trackpad. Holding the stylus pencil-style is very comfortable once you get used to it.

[dragonne]

I use a Wacom for some tasks, but I find it even worse than a mouse if you are switching back and forth a lot. For drag and drop I recommend the Contour Design Rollermouse Red. The downside is it doesn't pair well with a deep keyboard, as it wants to replace any wrist rest.