I use a naming convention that I picked up from a few guys who create a lot of textures for video games. By no means is it the best convention, its just something that I use.
For example:
‘T_Floor_D.png’
T= Indicates that its a texture file, procedurals use a ‘P’
Floor= The name of what the texture is, one word that best summarizes your texture.
D= What channel your texture is of for, ‘D’ for example is for Diffuse, ‘R’ is for reflection, ‘A’ is for alpha, ‘B’ is for bump, etc…
