I wake up in the mornings with "Shit Shower Shave" and leave the house with "Wallet Watch Testicles Spectacles". Simple mnemonics work, doubly so if you actually say them out loud and check them each off.
I do that exact some thing, and I haven't smoked in 3 years. The downside is that if I'm supposed to remember to bring something, in addition to those 3 things, I'm extremely likely to forget it. If it's super duper important, I tie it to the door handle.
To remember to bring a physical object, I leave my keys on it. Downside, sometimes people will bring my keys to me when they find them in strange places, like the fridge.
