Hello Dear, First of all, Happy Birthday to You from my side. You can do lot many things to make your birthday special and memorable.
1 ►Throw a theme party. Things to do on your 18th birthday should be different than years past. Black and White parties where everyone has to wear black and white, Hawaiian themed, Favorite movie, or Television series themed events do really well.
2 ►Take a small trip somewhere. Even if it is just for the weekend, a new way to do things on your 18th birthday include traveling. Even if it's only 2 hours away and you get to stay in a hotel and visit a large mall or attraction, it's still new and exciting.
3 ►Plan a girls night or a boys night. For a girls night, go get spa treatments and go out for supper. For a boys night, go bowling or paint balling. Remember to invite the parents when you think of things to do on your 18th birthday. You might be surprised at how much fun adults can actually be.
4 ►Write a letter to yourself about what is going on in your life and what you plan on doing in the future. The more specific, the better. For example, write down what you want for yourself in 5, 10, and 20 years. Then, seal the envelope and keep it in your purse or wallet until you turn 30. Things to do on your 18th birthday should involve thinking about the future.