[soora]

One way of improving your knowledge is something you have already done.

Get another job that will force you to expand your knowledge. I am sure your job experience with your first start up is serving you better than a CS degree.

Similarly, a job which involves doing low level computer programming would force you to learn a lot of very practice CS, and you would be getting paid for it instead of the other way around.

[jophde]

I have definitely been considering this approach. The issue with this is I don't think I am currently that desirable for anything that isn't Java.