Since you have a year ahead of you... you can plan out your LOR attack. The SAFEST thing to do is to:
-obtain 2 LORs from 2 science professors
-obtain 1 LOR from 1 non-science professor
-obtain 1 LOR from 1 dentist
-(this one is optional) obtain 1 LOR from boss/ex-boss
I would suggest you start studying for the DAT this summer (if your free of course), why waste the golden 3 months of summer time on expensive hobbies like shooting off your handguns and hunting rifles (sorry drifting toward my hobbies here)
but seriously, relax, you got PLENTY of time a head of you, you've done most of your pre-reqs, you might be taking upper level sciences here and there (guessing here)..... But I strongly suggest you start studying for the DAT asap and taking it toward end of this august... this will remove a HUGE weight off your shoulders
Good luck to ya