Fast Food Ate my Monies!

So, I just did some calculations with the help of my trusty online banking statement and already this month (it's only the 5th) I have spent $43.06 on fast food. Wow! This includes my new obsession, iced coffee, which is turning out to be a bit more costly than desired. And I've been wondering why I don't have enough money to pay my rent this month....Obviously I've never taken the time before to actually sit down and add it all up. 5 dollars here for a combo meal, another 2 something later in the evening for iced coffee, 4 bucks the next day at Taco Bell, and on and on. The food itself is expensive, not to mention the gas I have been wasting by sitting in line at the drive thru, engine running. At the end of the week I end up spending a small fortune. I need to learn how to:

A. Go grocery shopping and buy cheap things in bulk like my smart little mom does.
B. Start cutting coupons like my mom does.
C. Take advantage of dollar menu's if I find myself absolutley having to do the fast food thing.
D. (This is going to be the hardest) Cut back on the iced coffee. Maybe buy a coffee maker!?

I really had no idea I was spending this much on FOOD!