Here's what I do:
1) Work Overtime. That is PURE money in the bank. And where I work, OT is almost $30 per hour, and work is easy. I find it harder to keep from day dreaming about visiting Latin America.
2) As much as I hate coupons, USE THEM. They save you money. Your savings convert to cash NOT spent.
3) I've bet on games before, in the long run, the outcome is "usually" not in your favor. There are exceptions. As I've encountered them too. If you win, take the money and run. Don't make a habit of it.
4) If you look at deductions on your utility bills, sometimes grants are given to the public to help reduce their overall responsibility. That's cash too. $1.50. Doesn't pay much, but it's money.
5) Credit card rebates. I don't use them, but others have.
6) Call up the cable company and bitch when there's an outtage. YOU ARE NOT supposed to pay for service disruptions. Every now and again, may be hard to convince, but if your services go out often you can reduce your cable bill.
7) KNOW how to work the system. For example, if your flight is delayed by 30 minutes, call up the Airline and they give you a $50 eVCHR. The longer the delay, the more the money. It may take some convincing, but I KNOW airlines pay for service disruptions. YOu may need a Supervisor for that one or an agent that gives a damn. Most front line agents don't give a shit. Occasionally, you'll get one that cares; I use to work at American Airlines. I KNOW THIS IS TRUE. I don't give a shit what a rep tells you. Call back if needed, but don't be a dick to the agent.
9) Join Airline skymile programs. They also have one for dining, and shopping. That way your miles are available each year, and don't expire.
10) Don't take American chicks on dates. Waste of time and money.

Most important. Pay yourself first.