Was on adcom last year for our pharmacy school. Some tips:
1) hook or an interesting first sentence is a good idea. hulk hate standard, boring statements.
2) try really hard to avoid cliches (i want to go into pharmacy because of my passion for helping people) unless you can clarify with details. for example, which people do you want to help? your family, underserved population, geriatrics, etc.
3) please have someone else proof read your statement before you submit it. a flawless essay tells us that you actually put effort into your application.
4) be honest and don't exaggerate. no one is going to believe you had an epiphany during your trip to Amsterdam when you were 5 years old that made you want to become a pharmacist.