Plate Tectonics, Weather and Climate, Development and Tourism, World Cities.
I find world cities and development straight forward, you just need to know case studies. The physical options are difficult- you need to know the theory as well. Weather and climate is the worse for that- but its made all good if you know your case studies. I'm using:
MEDC Volcano- Mt St Helens, 57 dead
LEDC Volcano- Mt Nyiragongo, 147 dead
MEDC Earthquake- Christchurch 2011 (This is made easier because of the fact that it's the pre-released material)
LEDC Earthquake- Haiti, over 270,000 dead.
Tsunami- Indonesia 2004.
Temperate storm: Great Storm UK 1987
MEDC tropical revolving storm: Katrina, 2005
LEDC TRS, Cyclone Nargis, Burma.
Urban Heat island- Athens/Beijing
(I need to learn the climate change reduction stuff!)
NICs- Asian Tigers, China, India
Trade Blocs- European Union
Trade vs Aid- Sudan (great bit in the green revision guide if you have it)
Sustainable Tourism- Adelmar Hotels, Greece
Eco Tourism- Napo Region, Ecuador.
Economy vs Environment- Sarawak
Suburbanisation: Surburbiton, London
Counter-Urbanisation: St. Ives, Cambridgeshire
Reurbanisation: LOndon Docks/ Bristol docks
Urban Decline (and regeneration, gentrification etc)- Bristol / Islington
Retailing- Cabot Circus/ Cribbs Causeway, both Bristol
Sustainability (both waste and transport etc): Jakarta/Bristol/Manchester.
You don't need to know every single case study in great depth- for things like world cities etc you will probably only need to reference. You do need to know events in detail though, such as the eruption of Mt St Helens.
Find out the top ten here