I use the one Baiken posted in his double snap video (starting at 1:12)
Double snap, c.lk, s.mp, (j.lp, j.mp, s.lp, s.mp)
More reliable vs Ms. Fortune:
Double snap, c.mp, s.hp, qcf.lp, dash, (s.lp, s.mp, j.lp, j.mp)
Super simple and only gives the opponent a little over half a bar of meter...