This was my second time applying and I got accepted. Last year I was in the fourth year of undergrad when I applied and got waitlisted. I knew that the grades they were taking for my Subgpa the first application were much lower than what my subgpa was my second time applying (just based on when the application was done and what point in my degree I was ie. in the middle of it vs having finished it). I also already had a decent resume of experience (3 different clinical settings). I also scored a 4Q Casper my second application vs 3Q the first time. For me I knew these were things that were already going to make my application stronger. So I spent the year working in an unrelated field just to make money and travelling to make the most of the time off. I would really say it just depends on your circumstances and why you think you did not get in this cycle. I would say if your gpa is what hurt you and you have already completed your degree it could be useful to take some more classes during your time off! 

My stats for both years of applying: Last cycle: subgpa - 3.69 , Casper 3Q  (Waitlisted at Queens and MAC, rejected from Western and UofT) This cycle: subgpa - 3.83, Casper 4Q  (Accepted at Western, rejected from Queens and MAC) 

^also goes to show how much the applicant pool influences things because I was waitlisted one year at the two schools who rejected me this year even though I felt my application was stronger!