A milestone occasion, such as an 18th birthday, requires a thoughtful gift. However, deciding what gift to buy can be a difficult decision. Many 18-year-olds appear to have everything they could possibly need. Turning 18 years old signifies the move into adulthood, therefore your gift should take this into consideration. From a sentimental gift to remember the occasion by to an electronic item that will assist him through college life, the choices are endless. Decide on your budget then buy a gift accordingly.

Give a pamper gift to a girl. Buy a spa voucher that she can use to visit a spa with friends. Many day vouchers allow the holder to use facilities such as the sauna, steam room and hot tub. If a spa voucher is out of your price range then create a pamper gift bag instead. Fill the bag with tissue paper and add items for a relaxing night in. Add nail varnishes, face masks, moisturizers and a bath bomb for an inexpensive, homemade gift idea.

Turning 18 is a momentous occasion in a young persons' life. Give him a sentimental item that can be treasured for many years to come. Create a scrapbook and fill it with messages from friends and photographs of the fun times you have shared. If your budget is larger, buy a special piece of jewelry, such as a bracelet or watch and have it engraved with a personal message.

Many 18-year-olds rely heavily on communication devices such as cell phones, mp3 players and laptops. Although these items can be used in their social life, they are also beneficial to those going away to college to keep in touch with family and friends. If your budget will not stretch enough to buy a laptop, buy a useful accessory such as laptop case or Web cam.

Although the gift of cash or a gift certificate may not seem like the most original idea, it is one that will be well received. Many 18-year-olds entering college or work are often short on cash. Giving cash or a gift certificate will give him the freedom to choose a gift he really wants -- or save up for something special.