Get varied experience. Don't wait because actually landing a good opportunity can be hard to come by. I had to send soooo many cover letters/resumes to many different animal hospitals before I got even a couple of offers, and they were all volunteer. Go in person and hand them in. Write emails to research labs at your college asking to volunteer - doing anything from washing their dishes (if a research assistant position opens, they'll likely choose you), to assisting them with their research. Look for different rehab places - they'd gladly take volunteers! Get experience in many different fields, but show commitment and passion in one or two. As far as letters of rec from professors for vet school - I was told that it's better to get letters from profs in your 3rd or 4th year, because these professors know you in your more current state (I guess unless you really kept in touch with a professor from first year?). I don't know. Just get varied experience, and expect to get many rejections but keep trying! Once you get that first opportunity, other ones will come easier because you'll have had experience. Leadership is also a good way to stand out. Start a new club at your campus, be active in your school community. Become a member of the pre-vet club and you may have an "in" with admissions directors if you can get them to come to your campus for a club meeting and you make a good impression on them, keep in contact with them, etc. Sorry for the ramble, I could go on and on. haha good luck!