Use coupons - for anything you can. Shop sales. Better yet, shop sales with coupons! LOL
Don't spend change! I sort mine as I get it. At the end of the day, I empty pockets and wallet, etc, and put quarters in one baggie, dimes in another, nickels in a third. You'll be amazed how fast that change adds up
Don't spend ones...a slightly larger spin on the above. I try not to spend ones, they go straight into the basket with my change bags. Again, adds up fast. We typically don't even notice that we aren't spending them, the stuff we use change and ones on is just junky stuff like snacks and sodas from vending machines.
Pack your lunch. I used to buy frozen meals or the heatable bowls of soup. Now I just pack up a little left over dinner and take it with me. That's $2 a day in my pocket (well, my basket LOL)
Anytime you end up NOT spending money that you were going to spend, put it in the fund. For instance, I was going to take my car through the carwash which costs $7 and the vacuum costs $2. I ended up washing it and detailing it at home and put the $9 in my basket. Or, I have my house cleaned weekly but, sometimes, the woman cancels on me for the week...those times I clean myself and put the money in my basket. That rarely happens but it's a pretty big chunk.