Data Access Layer builders take the drudgery out the implementing basic database I/O routines for websites and other dotNet projects.
A friend (and ex-colleague) of mine Mark Crowley wrote his own DAL builder which I've been using for years, but recently I've started to look at Subsonic, an open source DAL which is part of the.
Setting up requires a bit of fiddling with the web.config, but once in place it saves a lot of time. The documentation on the official site is a little sparse so was pleased to find a blog with more information about using Subsonic.