When drawing or modelling, it's always helpful to have a reference image or two as a guideline. Problem is, good reference images can be hard to find, especially when it comes to action sequences and similar. The site Photo Reference for Comic Artists has loads of reference images. While many of them costs money, there is also a fairly big library of free samples to use.
As a 3d-artist you find yourself in need of textures from time to time. Two good sites with loads of free textures are the Filter Forge-site and Spiral Graphics. Next time you need a texture, take your time to browse through these sites.
