back to the OP:
1. Make sure you meet all the requirements for each school you apply to.
2. Make a list that spells out what and when everything is due for each school you appy to(VMCAS, GRE scores, transcripts, supplemental apps, fees, veterinary verification forms, or any other bells and whistles, etc).
3. As stated before, start early...
4. DON'T overextend yourself during the last few months of the application process (August/September/October) especially if you don't heed #3 (see above).
For example, don't do all this @ the same time: take 8 upper level classes that are @ a university an hour away, study for and take the GRE for the 1st time, work 20 hours a week, work on your VMCAs and supplementals for each school, and be in an october wedding.... or you will do this:
and then.....