I just created a Google Code SVN repository for storing my school projects and homework, and to allow easy transferring between school and home.
Its default directories i
That's what I use for my home source control.
Where I only have one primary repository.
Repository/Project1/Trunk
Repository/Project1/Tags
Repository/Project1/BranchesRepository/Project2/Trunk
Repository/Project2/Tags
Repository/Project2/Branches
I like this structure, it's very easy to reference projects and maintain integrity.