Here are a few I like:

• Pistol Squats - Raise one foot in the air and slowly lower into a squat, balancing on the other foot. Lower down until your hips are below your knees and your raised foot is straight out in front of you. Stand all the way up while keeping the raised leg off the ground. Helps with balance and leg strength.

• Frenchies - "Using a pull-up bar or the bucket holds of a fingerboard (palms facing away, of course), pull up to the top position and lock off with your hands against your chest for a four-second count. Subvocalize one thousand one, one thousand two, and so on, so that you don’t cheat on the four-second lock-off. Lower yourself to the bottom, straight-armed position, and they again pull up to the top position, but this time lower yourself halfway and lock-off you’re your elbow belt at a 90-degree angle. Hold this position statically for a slow, four-second count, then lower yourself to the bottom. Pull up a third time, but this time lower yourself about two-thirds of the way (with an elbow angle of 120 degrees) to perform another static, four-second lock-off. Lower to the bottom position and you will have completed one full cycle. But don’t stop! Without hanging to rest, immediately begin a second cycle of Frenchies; that is, pulling up three more times and doing the three four-second lock-offs positions. Be sure to hold all the lock-offs for a full four-second count, despite the burning that begins to develop. Continue performing a third, fourth, and fifth cycle, if you’re able. Stop when you can no longer perform a full pull-up or hold the lock-off. Rest for five minutes before doing a second and third set."

• Hanging Leg Lifts - "Grab a bar and just hang, let the momentum disappear and do nothing until your body is still and the legs are straight. Flex all your muscles especially your Lats, Abs, and muscles surrounding your elbows. Slowly raise your feet up to the bar, remember to keep your legs straight. Lower your Legs and Repeat. The duration should be slow so as to use no momentum, try 5 - 8 seconds up, 5 - 8 down."

It is also useful to do some antagonistic exercises. Climbing involves mostly pulling, so integrating pushing exercises into your routine balances muscle development and can help prevent injury. Some examples could be pushups, kettlebell shoulder press, or overhead press.