Study strategies for those who are low on time

Hey guys, I finally have gotten to a place in my life where it is hard for me to freely study Chinese at whim.  Thus, I need to look for more efficient methods.  What study strategies do you have that you think get good results?  I am interested in improving any aspect of my Chinese, be it listening, spoken, writing or whatever.  I might add that I am also light on the Internet these days, and I don't know if I'll ever own an iPhone or what not, so it has to be an old-school method in my case.  

Thanks!