These suggestions are A. very obvious and B. mentioned many times before here on the Budget Board...... but they bear repeating!
Eat two (or more) meatless or budget meals a week, such as rice and beans, oatmeal (Yes, for dinner!), scrambled eggs and toast, cheap mac/cheese mix.
Give up a costly habit.... smoking comes to mind first. Also, the daily cup (or three) of coffee or latte. Make it yourself at home before you leave and take it in a thermos or give it up all together. Give up the soda/snack machine at work/school. Keep a box of granola bars in your desk drawer.
Pack your lunch a few days a week. It's easier than you think!!
Hang your laundry outside whenever possible. (Here in NH that is a valuable suggestion, as we have very expensive electricity!).
Avoid those random trips to the mall for entertainment. You KNOW that you end up spending while you are there!!
Make it a challenge to yourself to see how many days you can go without spending any $$. (I think my longest is about 5 days!). Obviously gas money to get yourself to work is exempt from this challenge!
PAY OFF DEBT!!! Credit card charges are beyond outrageous!!
When you have accomplished a few of these items, reward yourself with a big deposit in your vacation account!! ...........P