Yay!
+1 on keeping the gear ready to go. Less of an issue when you're riding from home, but when you're driving to ride, it's harder to forget something when it's all in one place.
I keep all my gear in a mesh backpack, which is really nice, because I can throw my sweaty helmet, shoes, gloves, etc., right into it after a ride, and there's plenty of airflow through the mesh so they dry without getting gross. It lives in the house next to my bike, so I can pull my things out of it if I'm riding from home, or pick it up and take it with me when I drive to a ride, or transfer it into someone else's truck when we carpool to an organized ride.
Plus, if weather conditions change (or I just change my mind about them) between the time I get in my car and when the ride takes off, I have my clear glasses and sunglasses, my arm and knee warmers, FF and fingerless gloves, shoe covers, sunblock, whatever I need.
Speed comes from what you put behind you. - Judi Ketteler