Millennial money expert Stefanie O'Connell, author of The Broke and Beautiful Life, has some advice for pinching pennies while enjoying yourself. Some obvious tools for saving are coupons and bonus cards. But a real great place for free stuff is your local public library, which is good for a lot more than the opportunity to borrow books for free. Many libraries now offer technology classes, crafting programs, and DVDs that you can rent. For other free things to do, check out your local parks and recreation website. Some parks may offer family movie night during the summer or host outdoor concerts that you can enjoy.