I just spent seven days with only a limited data plan. I felt like time slowed down to a crawl and I was able to do much more than on a regular day with the internet.
I've cut down to a 2GB plan for this reason. Initially I was just switching networks but I stuck with it because of how much better I felt. Being more data conscious made me realise how much time I was wasting. I used to consume 2-3 times more data and now I don't even hit my cap anymore.