Personally I keep my WIP and test programs in my documents folder which is synced with my dropbox folder.
This gives me very quick access to my sketches from anywhere in the world and there is no messing around re-committing the code (simply save it to My Documents and dropbox does the rest). Dropbox also gives some revision control, as you can view and restore back to previous states.
Once I am happy with the code and want to make it public, I upload it to github.