Live within your means, and always purchase used vehicles, forever. You will save between $50,000 and $100,000 over your lifetime with used cars.
For another easy saving tip: I take the coins out of my pocket each day and jug them, keeping a few pennies to make change with. This adds up very quickly and will surprise you around Christmas when you find out you have $300 you didn't know you had.
Dump your cable TV, get an antenna and DVDs.
I buy very good condition hardback books at yard sales for 50 cents or a dollar, then sell or trade them to a local used bookstore. They love history and modern literature, and now and then I score a classic first printing and make some bucks.