I suspect that your inability to concentrate is at the root of everything. Judging from the responses here, it seems to be a common phase for software engineer

I suspect that your inability to concentrate is at the root of everything. Judging from the responses here, it seems to be a common phase for software engineers to go through. I went through it myself recently, and it lasted for several months. At first I attributed it to stresses from homebuying, marriage, etc. But eventually the excuses ran out, yet I still found myself spending a lot of time surfing the net and cruising on my past accomplishments. I tried schmacking myself across the face. I tried changing the position of my monitor to make it easier for others to spot my laziness. Nothing seemed to work. I had gone from being a top producer to a worthless slouch, and I couldn't get seem to get out of my rut. Then I finally realized the bleeping obvious: I simply no longer had any interest in what I had been working on. What started off as challenging work had turned into an endless stream of moderate enhancements and inane customer support issues. I was very fortunate to be in a position where I could transfer ownership of the project and move on to different things. The effect was immediate. As soon as the work became challenging again, my productivity immediately shot back up. Hopefully you're in a position to do the same. Good luck!