I wish I had more to share myself, but mine are:
1. Quit or cut back on drinking alcohol. Especially true if you go out to bars and nightclubs a lot, where drinks are generally more expensive than elsewhere. One day I did a bit of math and realized that I'd spent over $10,000 over the course of a couple of years just on alcohol, mostly just beers. It hurts to think that I could've invested that into my business or other assets.
2. Quit smoking. Yeah, I know some people will hate this one But aside from the money you spend on cigarettes themselves, you could potentially be saving yourself from costly medical expenses down the line if you develop health problems due to your smoking (which I've had happen to relatives of mine.)
3. Eat healthy, exercise regularly, and reduce/manage stress. Related to #2, the better your diet and overall fitness, the less likely you are to develop medical conditions that lead to hospital stays or need to be treated with medications, etc.
4. Cook meals at home and eat less fast food.
What are some of your favorite ways to save money?