Your Vitamin D deficiency and lack of exercise is probably causing part of your depression.
Try to get one hour of sunlight per day and one hour of exercise per day. Two birds with one stone: go jogging for one hour per day, every day, no matter what.
For me, I couldn't wait to finish my hour of exercise so I could go do something challenging and important, like work on your big idea.
I really like Jeff Bezos, I didn't know he was such a modest, smart, and capable guy. Reading this interview has made him an inspiration to me. I like how he was so honest. From this interview, I imagine he's a great guy to work for and with.
I am thinking of using wxWidgets as well for my current project, although it doesn't require much of a GUI. All the guts of my app are in cross-platform C++ (by cross-platform I mean Linux, Mac, and Windows). I have connected a small GUI to it in Windows using WTL, but could easily change it to wxWdigets so I have one GUI to maintain and not three.
Try to get one hour of sunlight per day and one hour of exercise per day. Two birds with one stone: go jogging for one hour per day, every day, no matter what.
For me, I couldn't wait to finish my hour of exercise so I could go do something challenging and important, like work on your big idea.