I'll second the water and potassium. I don't so much get cramps while exercising, but do get them at night sometimes. I eat a banana for my mid-morning snack every day and have five prunes for desert every night. That, plus plenty of water seems to work well. If I've been on my feet more than usual during the day, I'll also stretch out before bed.
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.