List to get out the door post

Why is it that when I am backing out of my garage, I suddenly remember 2 necessary items I needed to take with me?

Today, it happened to both my husband and myself. We had to stop the car and both get out and run in the house and pick up what we forgot, me some postcards to mail, him the Netflix to put in the mail. We just organized our departure from the house to include these items, we just didn't get out the door with them, the first time.

• Make sure I have my phone
• Make sure I have my laptop
• Make sure I have a coat
• Make sure I put the dog out
• Make sure I have my coffee cup

Check, check check!!! It's a long way back home, and a waste of gas if I don't get this right. Could this be age? Too much input?