I try to be mindful at work and find some time for mini meditations that focus on breathing. They call them "minis". The key is finding a nice quiet place or perhaps to take a walk and soak in the sunshine while breathing. This isn't easy for me especially since there aren't many (any) private spaces where I can go without being noticed.

I have also focused on de-emphasizing my job and focus more on ME these days. It sounds selfish (and it probably is) but no one can help me more than me. My priorities are now geared toward things I do outside of work. I have some hobbies - guitar, model making, reading. I used to think my job defined me but now I realize that work is just a means to an end.

You're NOT useless and you're NOT a failure! Society projects those definitions on others. Rock on.