Ask HN: Advice on courses for a MS student?

I'm a Masters student at a US univ. I can only take a fixed number of courses every semester, but I'm interested in a lot of things...( for example, I am currently agonizing over a choice b/w a course on computer vision v/s computational geometry, as I kind of love math as well as coding). I'm not sure about what I want to be in the future (i.e entrepreneur or academic ) but I do know that HN folks are the more intelligent and practical people. So what I'm asking is: what things should I keep in mind when selecting courses? Any views/comments would be greatly appreciated.