Unfortunately I have drawn a rather big blank, despite reading through reams and reams of sheldon browns thoughts, and searching many many forums I cant find a rough guide to gear ratios, not how to calculate them but rough recommendations for terrain. I know that everyone is different but i'm just looking for a rough recommendation of what might be good. Cause atm i wouldn't know the difference between a ratio of 3 and a ratio of 6 (though i am aware that its quite a big difference)

Please help