My favorite improvement that our agency made to our workspace isn't the dual monitors, isn't the shorter hardware upgrade cycle; my favorite improvement is the sit-stand desk. Seriously. I think every desk worker should get something like this.

I used to have all sorts of minor aches and pains from sitting most of the day. Now I spent an hour standing, an hour sitting, plus the usual breaks, etc. I'm more productive and happier. If your company won't buy one for you, buy it yourself. It's worth it.

Once try to solve a bug, from a program of size 100mb. Then you will probably known what happens to your brain. Try to continue a project, which is huge, without any documentation, it takes years of efforts, to do so.

Call me a fanboy, but my Apple Watch's hourly reminders to get up and walk around have helped immensely.