going back to john182rs question about 1*2 and mpg best way is change gear early but there is a balance between revs and speed, i would guess upto 3 - 3.5k for normal driving with the 2.0 litre just be gentle with the throttle and keep it 65-70 ish on the motorway.
in reality to save on mpg its about looking ahead and anticipating events, but to be honest if you have a 1*2 the cost diff between just relaxing and enjoying driving from a-b and trying to drive from a-b as carefully as possible is only going to cost 2 or 3 £ max per full tank of fuel.