Inspired by another thread where I asked this question and I don't want to hijack.
So I'm cycling to work and I have no idea how to best use my gears.
At present I'm in the "highest" most difficult gear other than on hills. I'm not sure if I'm getting the best efficiency as I see people zooming past and their legs not going mad (and legs hurting!! I am pretty unfit and overweight).
DP blames my bike, but it is a decent bike and my late mum bought it for me so I'm not about to change it. Its a tourer so not designed for speed.
I think I'm putting in more effort than I need if I had got the gears right.