CGP guide is so good for Geography, I would be lost without it! I am doing Development Gap, Population Change and Tourism.
The good thing about Human geography is if you forget the effects or strategies you can still get marks by using common sense e.g. everyone knows the affects tourism are littering, traffic, better economy and damage to buildings for example, wheras in physical you have to know solid facts. (like how many people died in what Earthquake, when, why, how etc.)