[Cryode]

I'm 28. My focus sucks overall, but a recent improvement I've made is the type of music / noise I have while working. I switched from music I really enjoy and tend to sing/hum with, to electronic music with little to no vocals and upbeat tempos. My mind focuses less on the words and music, and allows me to think more about what I'm doing.

I've also tried some white noise creators, like this one for coffee shop sounds: http://coffitivity.com/ Personally the techno music works better, but you may be different.