I normally follow these steps:
1. Find your merchandise and pick it up
2. Make your way to the check out isle
3. Wait in line patiently (if there is a line of course)
4. Say hello very nicely to the check out lady (or if it's a dude then say sup!?"
5. Slam the merchandise on the conveyer belt and just look them in the eye (make sure you give them "The Look")
6. Once you have bought your merchandise, walk outside the store (not to fast and not to slow, just normal as if you are just a regular person)
7. Make your way to your motor vehicle
8. Step inside
9. Lock the doors
10. Scream with excitement and jump up and down with joy
11. Go home and repeat step #10
12. Go back to store and repeat all other steps