From increasing the DPI to tweaking the delete gesture to something proofreaders will recognise. I'm amazed OEMs don't do most of these as standard on touch tablets, although what Windows 7 really needs is a pen and touch combo screen. If you can't afford that, or you're using a touch only screen until the Asus Eee tablet turns up, check out my tips at Tom's Guide.

http://www.tomsguide.com/us/Microsoft-Windows-7-Tablets,review-1629.html