The worst possible thing you can do is get a LOR from a person that you don't know well. That is why getting to know a couple professors really well, is so, so important. Adcoms can sniff out a generic LOR a million miles away!
Get involved in research, be a TA for a professor, get to know your boss-pharmacist, especially if that person happens to be on the state pharmacy board
Go to your prof's office hours, email them with questions, let them know who you are and that you hard working, but don't irritate them either with too much brown-nosing.
Adcoms aren't going to give two hoots about your 4.0 if you made no connections, did not go the extra mile (outside of studying), did not get active in your school, etc.
Also when you ask someone to write you a LOR, be sure to provide them with a complete CV and STAMPED, ADDRESSED envelopes. I know that sounds obvious, but you'd be surprised. You'll get a much better LOR from someone you haven't recently irritated by asking them two days before the due date to write a letter without providing any of the aforementioned things.