Try writing your own graphical and user-friendly operating system? That could be very interesting, and would probably be a worthy challenge if you have the patience to see it through... and it would look good on a resume too. Heck, if you make a really good one, you could oust Microsoft from its throne and introduce Kedaeus-ows to the consumer market as the cheaper, stabler, faster, more flexible and more user-friendly replacement for Windows! Fame, fortune and fulfillment in one easy step!