Got an eye exam coming up? Maybe your doctor wants to check your blood pressure. No problem! Here's how to prepare for three routine screenings, so they go as smoothly as possible. We got these tips from the researchers at Real Simple magazine.* An eye exam. Whether it's an annual exam or a glaucoma screening, skip the alcohol. It can dilate your blood vessels, giving you that "bloodshot" look, making the exam more difficult. That's the word from Sanjay Asrani, professor of ophthalmology at the Dune Eye Center in Durham, North Carolina. For the same reason, rest your eyes the day before - which means no late night computer work. You want to try to book your exam in the morning, when eye pressure is higher, making it easy to detect problems.* Blood work and blood pressure. This usually means no food or drink for 12 hours before the test, since any calories you've ingested can skew the results - although water and decaf black coffee are fine. Definitely no caffeine. Also, when scheduling the test, mention any medications you're taking since they can also affect the results - that includes herbs, vitamins and OTC drugs. That's the advice of Kathleen A. Handal, an emergency medicine physician in Phoenix. She also says that if you're getting blood drawn, ask to have it taken from your non-dominant hand. This'll minimize the discomfort your feel afterwards. When your blood pressure is measured, take several slow, deep breaths before the cuff is put around your arm to help prevent "white-coat hypertension." That's the phenomenon of blood pressure spiking simply because you're anxious about getting the test.* Ladies, you need to have a mammogram once a year, beginning at age 40. Although if you have a history of breast cancer your doctor might want to see you sooner. Before the test, cut out caffeine for two weeks. According to Mary Jane Minkin, professor of obstetrics and gynecology at Yale University School of Medicine, caffeine can create benign lumps in your breasts. Also, don't wear deodorant or lotion, since either once can alter a mammogram's appearance. After the exam, you might feel sore, but Minkin says it's nothing a little ibuprofen can't fix.