One thing that I remember when I am climbing it to let my gears climb for me. I have not been climbing long at all. I am a heavier ride too. I try to remember when I am in a climb to sit a little farther back on my saddle, keep my breathing under control, get in my lower gears and let them do the work. I may climb slower than most, but I can actually feel my bike and body working together. I don't get as tired and can last up most of the climbs I have been doing. 6-9% grades. Nothing huge but I am working towards bigger climbs each time I do something harder.
2009 Dawes Lightning 1000/stock saddle