Ah laziness, my old nemisis. I know that feeling of listless boredom and I have found that it can be dreadfully difficult to get rid of, but this is how I beat my laziness. Get up at the same time each day, although you have free time, lie ins should still be an occasional treat. Immidiatly after getting up, do some small amount of excercise, a ten miniute brisk walk or something. I have found that this helps me feel energised and like I should do something with my time, rather then just mong about. I also find drinking quite a lot of water first thing in the morning helps, but that is more to do with me having problems getting up, if you don't have the same problem, feel free to ignore that.
As for the rest of the day, have a list of what you want to acheive with your free time and structure your days accordingly. Maybe even go as far as to timetable your day. I have found that just having vague notions of things I want to do isn't good enough motivation for me to get off my back side and get on with it. Specific goals are much more easy to work towards. So are deadlines. This might all sound very formal, but I reckon you probably need structure in order to kick start yourself back into productivity. Once doing stuff has become habitual again, you won't need to plan your time quite so rigorously.
Starting to do things again is the hardest step! Once you start keep up the momentum. Have a spare 10 miniutes? Maybe theres some washing up that you've neglected or some finsihing touchs to an article that you could write. I find constantly doing things makes doing the things you want to do easier, weird as that sounds.
I hope you find my advice useful, it's what worked for me, but then I wasn't in quite the same situation you were in. Good luck for the future!