Make cards for special occasions (birthday, Christmas, anniversary, graduation, etc...) at home instead of buying them from the store.
Get a set of clippers and learn how to cut your hair at home. You can learn how to cut hair from many YouTube videos.
Dry cleaning can get expensive over time. You can buy a home dry cleaning product or buy wrinkle-free clothes that don't require dry cleaning.
If you can bike or walk to work or school, do so. It can save you a lot of money on gas and help you get in good shape too.
Don't buy new electronic gadgets just because your friends have the latest and greatest. If your old cell phone still works, keep using it.
Swap clothes with your friends. You get the benefit of saving money and being able to wear new clothes.
If you like a certain theme park and go there frequently, consider buying a season's pass or a membership for unlimited admissions.
Learn how to cook, so you can make your own meals at home and not have to spend money on eating out all the time.
Take studio style pictures at home instead of going to a photography studio. All you need is some good lighting and a camera.