I've been very very wary of linking to a post on weight and climbing as it's such as a dangerous topic/game to get into. I'll make an exception for this one, TrainingBeta.com has a great article up from it's owner and author, Neely Quinn, (who is a nutritionalist that works in her full-time job for another food-related site, and is also a grade-8 sport climber). Well worth a read if you're interested on the topic. It's well thought out, well written and concise, I've listed the main titles below which should give an idea:
#1. Stop eating so much
#2. Eat Whole, Real Foods
#3. Carbs (and Protein and Fat)
#4. Weed Out Food Sensitivities
#5. Don’t Exercise Too Much
#6. Get Enough Sleep
#7. Drink Lots of Water
Of those, I've always been pretty good with #1 (I've even used MyFitnessPal for a fortnight as described to get an idea of the balance of foods I was eating at one point a year or two ago - showing I was terrible at getting protein intake) , am always learning more in #2, #3 is tricky, #4 is one I've learned a lot about in the past couple of years, #5 is the eternal problem of almost all climbers(!) especially those early to the sport, #6 I was terrible at but fixed several years ago and #7 I'm good and bad at it in equal measure (yesterday being a great example of a bad day and a ton of exercise meaning a hand that was almost starting to cramp shut....). Always more to improve at! The main thing is to be sensible - climbing is largely a technique and strength-based sport so eating enough to keep your muscles fed, your body healthy seems like a good idea! It's also good for general health issues so there's no excuse....
Where do you fit into these topics?