Step 1: Decide what you want, and narrow your special requests (i.e. no mayo) down to two. Anything more than two will confuse the workers and you will get a completely incorrect sandwich.
Step 2: Tell the cashier what you want (do not relax yet).
Step 4: Repeat the last 1/3 of your order to the cashier after they repeat your order back to you. Note: their repetition will be wrong and you may have to go back to step 3.
Step 5: Pay for your sandwich, receive an incorrect amount of change. Determine whether it is wrong enough to be worth getting back in line.
Step 6: Wait around for your sandwich while people push past you to get to the soda fountain.
Step 7: Receive sandwich with at least one error. If you are not allergic to the error, proceed to Step 8. If you are, go back to Step 2.
Step 8: Get your own bag and napkins, this is too confusing for the people who already cannot figure out how to make a sandwich.
Step 9: Go back to work and spill lettuce on the keyboard writing a rant on craigslist.