On the topic of spare magazines. I refuse to carry a spare magazine - it makes carrying a hand gun that much more difficult for me and its one more thing to to keep track of that can get lost.
Currently, before I leave the house I have to remember to have with me:
1. Gym bag with gym clothes
2. cell phone
Enough is enough
! I thought about inventing a cell phone that can replace the grips in my pistol, but answering a call might alarm some folks.