In reply to NelsonJ:
The truth is already listed above but DO NOT forget to change your diet. At the crag or at the gym, regardless of the length of the walk-in, you must only eat CLIFF bars. After a work out, protein shakes must be consumed - the more radioactive the colour, the better. Learn about the words "granola" and "burrito" and apply that knowledge to your new diet.
Other life-style changes can help, too. For example, only approach shoes are known to preserve that vital foot-shape you should be seeking so you should wear them at all times - even in the city, on the tube and at work.