I am majoring in CS - Software Engineering.. Should I minor in Information Technology or...?

Your minor should broaden the scope of your major rather than largely duplicate it, so I would rule out IT straightaway. Ultimately it should also reflect your interests and the direction you want to head in. Electronics engineering, math, even physics would be good fits fro ma technical standpoint but pretty much anything will have application in one field or another. The only thing I'd advise against is anything to do with business or management: those are very popular but ultimately useless. Put simply you will not be trusted to run anything as a newly qualified graduate on the basis of a tiny bit of a degree so you are better off learning something of some practical application instead.