We've been having some weirdness going on with our source control.  Nothing major- (Note to our clients: your code is safe and backed up daily!) - but little things like files getting out of sync, or appearing checked in in the IDE, but not in the source control server.   While searching about it, I ran across this definitive guide to source control  by none less than Mr. Source Control himself, Eric Sink- founder of SourceGear.   This mini e-book is very well-written and covers a broad spectrum of source control concepts and tools - not just Vault.  In addition to explaining the concepts in laymen's terms, he peppers best practice side-bars through out the text, distilling the concepts into concrete guidance developers can use.   It's old - started in Aug 2004- so I'm surprised I'm just now coming across this, but it's definitely a must-read for any developer working in a team > 1.