Design Cuts is a wealth of resources to build your library. They offer everything from textures, fonts, vector graphics and brushes. If you sign up for emails, they will let you know when cost-saving bundles are available. If you can’t wait, they just opened an online store so you can get the goodies as needed.
Not only do they give you access to plenty of resources – but they also show you how to use them in clear, easily reproducible tutorials. All of them can be found in the Design Tutorial Archive.