Source Control is a basic requirement of any development shop, even one-person teams. The first time a big refactoring operation seriously breaks your project and you can roll-back with just one click, you’ll be sold.
There are a bunch of solutions out there for Visual Studio, but integration with the IDE is almost always going to cost you some money. I use VisualSVN, which costs a few dollars and requires TortoiseSVN to be installed on your local machine.
If you’re after a free solution, Axosoft have just released v1.0 of their Visual Studio Subversion add-in called RocketSVN. It’s free for a limited time, so go grab a copy now.
If you combine RocketSVN with the free VisualSVN Server (a Windows management interface over a traditional Subversion server installation), you’ve got a no-cost source control package with full Visual Studio integration. If you’ve been sitting on the fence on this one, now’s the time to act.