I'm in a similar possition, I am looking for work but that can only take up so much time after that has been done have the rest of the day with nothing to do...
I have been walking to the job centre andd back almost dayly as that takes up some time, but other than that I have basically been reading and sat on the internet
Are you on any benefits? If you are you may be able to go on a night course for free or at a redused rate.
Maybe you could visit the library and get out some books to read? MAybe get some textbooks on something that you would like to study and learn about it yourself?