In reply to KeithAlexander: if you're in the Central Belt or Southern Highlands then Upper Cave Crag has to be high on your list. Don't quote me on the grades 'cos everytime a new guide book comes out the grades seem to have gone up! So I would suggest Deaths Head (which used to E1!) which people who learned their footwork at climbing walls tell me has a hard move at the top; then there is Tombstone with its pumpy runout; Corpse which is steady with a well pro-ed hard move at the top. Finally there is Warfarin, which is longer and harder than the others.
Limekilns in Fife might be a better option for breaking into the grade, but if you can do routes at Upper Cave, you'll manage most routes of the same grade anywhere else in Scotland.