Mindless Things

I have recently noticed certain actions that I do instinctively that don't make much sense.
Here is a short list of my mindless things:

1. Whenever a plane passes overhead I always look up and try to identify the carrier by the logo on the tail. What good could that possibly achieve?
2. When unlocking the front door, I always strive to get the key in the lock in one swift move with no jittery fumbling around the keyhole. Is this necessary for anything except a cruise missile?
3. I always crumple paper before I toss it in the bin. It's my way of saying goodbye I guess.
4. I immediately delete SMS messages I receive on my cellphone right after reading them.
5. I feel one currency note is worth more than several notes even though their total is the same ($100 > 10 x $10)
6. The "Enter" key on the keyboard has to be slammed down, if I just press it the computer will think I'm kidding.

Do I need therapy?