I wrote this a while back for my club members. Check it out and see if it helps.
(oh, by the way. I smoke most people on the hills so I know this works for me)
Here are a few things I do to make climbing hills a bit easier.
Practice standing up more on the flats. This helps build those other muscles in your legs.
Alternate standing and sitting while going up hill. It uses different muscle groups and can help the other muscles rest a bit.
Pulling up on back stroke. Rather than just mashing down on your pedals the entire time, try pulling up on your pedals. Works great when you alternate this with pushing and lets a few muscles rest at the same time. Works standing up too.
Scoot way back on your seat. This helps your body use more muscles and gives you more power. It also changes your position in a way that is more like pushing away rather than down. When sitting clear at the back of your seat, you will feel your behind working more too. Great way too firm up that back side...
Drink plenty of fluids. It can be difficult to drink when climbing due to increased heart rate and breathing. But in the few moments it takes to get a drink, you often forget to feel the pain in your legs.
Distraction. I have found that distraction while climbing helps the most. If you are on a long steady climb, messing with your bottle, taking inventory of your pockets, checking your computer and even sending text messages on your cell phone (although not safe) helps take the focus off of the pain in your legs.
Breathing is vital. When I start a long climb, at the very beginning I will start monitoring my breathing and try to get it into a rythm. I concentrate on exhaling only. I exhale quite heavily and put alot of concentration in it. Not only does it help you get more oxygen into your lungs, but the concentrating takes the pain in your legs away.
So now you know what my climbing secrets are. Try them out and see if they help you. Keep in mind that the first time you try these tecniques, its going to hurt like hell. But the more you practice, the better it feels and the stronger you get.