The main thing to do before you get into any rigging is get your uvs laid out. Once the uv's are done most begin texturing and sculpting and do the rigging last. There are other options as some will texture and sculpt in zbrush after modeling as zbrush does not need a uv map so this can be set up later. Also there are scripts that will enable you to transfer the uvs to an already rigged model without messing up the history.
I think the main workflow used be most is this though

Model, UV, Texture/Sculpt and then rig.

Good luck