Props to DejaVu and bhfd64 for posting these links... which essentially say the same thing:
1. Charge to 100%
2. Wipe Battery Stats in Recovery
3. Use up as much of the battery as possible (to sub 5% consistently)
4. Charge to full.
Link to good versions of CWM and further tips: HOW TO: Solve Battery Life Issues - xda-developers
More detailed descriptions of L-Ion batteries: How To Battery. - Android Forums