Supplemental Managment Courses?

I have seen mention here of different programs through ivy league and other big universities that are like little 12 week things. I am thinking of doing one to bolster my resume. I know they don't mean a LOT to future employers but I am in a position where I essentially have to put in a couple years at my job to build my experience and then they sky is the limit. So, in the meantime I am looking for little things to boost my resume. Any other ideas are welcome. Also thinking maybe volunteering, maybe getting into rotary club but idk if those things are tacky on a resume. TIA.