Should I apply this coming cycle, or wait a year to boost my app?

So I'm trying to decide whether to apply this cycle or whether I should wait for an extra year to add some more volunteering and other ECs which I'm pretty light on and not sure I can really boost enough in time for this cycle. What do you guys think, will boosting these weak areas help my chances by an appreciable amount, or is it not worth waiting? I'm summarizing my app below: From Northern CA, graduated from UCSB w/ BS in Biopsychology cGPA 3.74 sGPA 3.64 (this is including... Should I apply this coming cycle, or wait a year to boost my app?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums