Guys/Gals:
The following link to John Deakin's fabulous article answers all your questions on leaning during the climb.
http://www.avweb.com/news/columns/182176-1.html
JD's technique of noting the EGT on take-off (assuming the engine has been properly leaned, before the takeoff roll if at altitude); and then maintaining a constant EGT reading by gradually leaning every 1000 or 2000ft until the FTH limit (about 8/9000ft) works extremely well (talking non-turbocharged engines here). It also means that by the time you have reached cruising level the aircraft is essentially correctly leaned and, if the climb has been protracted, you have also made some significant fuel savings whilst climbing with full available climb power.
The same site also has other articles covering recommended leaning techniques during ground running, cruise and descent.
Definitely mandatory reading for any serious pilot so they are worth printing off, studying carefully and filing in a safe place so one can regularly refer to them for refresher training.