I just recently started washing once a week. I use either Motions neutralizing shampoo, or whatever samples I have on hand. I am really loving some Breck's samples I have. I condition with either Pantene Hydrating Curls, Aussie 3 Minute Miracle, or Lekair cholesterol. I leave it on for however long is feasible, rinse, and begin styling.
Depending on the style that I plan on wearing that week, I will rinse my hair and condition mid week. I usually only do this if I plan on going from a wrap look to a braid out or from braid out to braid out. I find that rinsing mid week adds some more moisture to my hair.