Yesterday, I saw a dime buried in the slush in a parking lot of the store I was at. I picked it up, wiped it off, and put it in my pocket. I then proceeded into the store and bought crap I didn't need, simply for something to do yesterday afternoon.
Coupons most of the time, as they're rarely worth it. Save 50 cents, limit 1 per customer. On something that cost's like 10 bucks. Now if I happened to run across like 20 of those coupons, and they stacked, great, but coupons rarely stack and are usually limited to 1 per customer. Sure you can go in and out all day and they probably wont recognize you, but that's more trouble than it's worth.
We'll save a bunch of coupons and stock up on things when it appears they're on sale. Even though it's 50 cents here, 75 cents there, when you purchase a pile of things, it can add up to $40 or $50 worth of coupons pretty quickly.
I have been saving/investing 10% of my pay since I started full-time work before I turned 18, that was 33 years ago (I went to college at 26). That and an inheritance allowed me to retire at 45. Being frugal helps; I drive a 22yo. car and watch a 19yo.TV. My dad instilled a frugality in me that says to never throw anything out if it's still working. That alone has added so much to my savings. Facing mortality (as I age) has a way of making one conservative (financially).
I also prefer to run vehicles into the ground. Though, last week, I bought a Cruze for my wife. Just filled the tank up yesterday and did the math: over the course of a year, assuming we drive the same number of miles on that as we did our grand caravan, we'll save just shy of $2000. So, in 6 years, the vehicle will have paid for itself via gas savings.