grunewar wroteDraft yourself a packing list and check it each time before you depart.
Same here. Even had it laminated. I check it after packing my bag for every game.
I used to carry a gym bag (shoes, etc) and a garment bag (shirt, jacket, pants). Forgot the garment bag once. With apologies to Scarlett O'Hara, I'll never go stripe-less again.