Sara Ford has this market cornered.
http://blogs.msdn.com/saraford/default.aspx
More Visual Studio tips and tricks than you can shake a stick at.
Some others:
- The Visual Studio 2005 and 2008 3-month trial editions are fully-functional, and can be used indefinitely (forever) by setting the system clock back prior to opening VS. Then, when VS is opened, set the system clock forward again so your datetimes aren't screwed up.
- But that's really piracy and I can't recommend it, especially when anybody with a .edu address can get a fully-functional Pro version of VS2008 through Microsoft Dreamspark.
- You can use Visual Studio to open 3rd-party executables, and browse embedded resources (dialogs, string tables, images, etc) stored within.
- Debugging visualizers are not exactly a "hidden" feature but they are somewhat neglected, and super-useful, since in addition to using the provided visualizers you can roll your own for specific data sets.
- Debugger's "Set Instruction Pointer" or "Set Next Statement" command.
- Conditional breakpoints (as KiwiBastard noted).
- You can use Quickwatch etc. to evaluate not only the value of a variable, but runtime expressions around that variable.
