I know all about hills now. I have two massive hills I ride up at the end of every work day. I just go into them calm and collected, in a moderate hill climbing gear, not too easy but not too difficult, just so I can maintain a consistent pace up the hill. I then go into my "zone" and try not to focus on the leg burning and instead focus on the music in my headphones lol. I'm getting faster every week and find myself passing other commuters up the hill more and more.