Here are a few of the tricks I do to help myself remember things:
Have you ever gotten half way to work and realized you forgot something in the kitchen you meant to take to the potluck? My trick is to put my car keys in the refrigerator or next to the item. I can't leave without the car keys!
While driving, I may think of something I've got to pick up at the store on the way home. I can't write it down, so instead, I turn my ring upside down with the stone in my palm, or put the face of my watch on the inside of my wrist. It will bug me enough that I won't go on "auto pilot" and get home without stopping for whatever I need.
Sometimes I'll call the house phone to leave a message for myself! Reminding me to bring that book for a friend at work, or what have you.