I hate hills. I find that I don't have the cardio yet to take a hill seriously. The little bit of advice that I have recieved so far is
- stay in your saddle if you can, when you stand up you cause your heart rate to increase rapidly. Which isn't good on a long pull.
- gear down. As soon as you start to feel it getting hard drop a gear.
- practice. Lots of practice will make the hills a little easier to tackle.

I am not an experienced rider. I have only been riding since August of last year but these are pointers that my husband and several of the climbers in my club have been telling me. Good luck to you!