This seems like a contradiction in terms. If it's "after work", why do you want to be productive? If you're being productive, you're still working.
Or do you mean "after I finish my day job which I don't really like, how do I find the focus and energy to work on my own, more interesting stuff afterwards?"
If this is indeed your situation, here's what worked for me: find a way to make a living from what you really enjoy working on, and then quit your current job and do that. I know it might sound impractical at first, but it can be made to work, and it's the only way I've found to be truly happy in my career. Screw 20% time - I want 100% time.
Also, as others have said, reading tech blogs != productivity. It's what I do when I want to stop working and take a short break. I've also found that taking public transport to/from your place of work instead of driving (if this is a practical option for you) is a good way to get time to do this kind of stuff.
Or do you mean "after I finish my day job which I don't really like, how do I find the focus and energy to work on my own, more interesting stuff afterwards?"
If this is indeed your situation, here's what worked for me: find a way to make a living from what you really enjoy working on, and then quit your current job and do that. I know it might sound impractical at first, but it can be made to work, and it's the only way I've found to be truly happy in my career. Screw 20% time - I want 100% time.
Also, as others have said, reading tech blogs != productivity. It's what I do when I want to stop working and take a short break. I've also found that taking public transport to/from your place of work instead of driving (if this is a practical option for you) is a good way to get time to do this kind of stuff.