Waeeelll...I have tried and tried messing with a bunch of different settings on there and everything I do makes it worse.Do you have the focus point set to a single point? Do you also have the focus point set to the smallest available focus point?
I have often heard Canon owners greatly disparage the Olympus DSLRs that I have and use.
I just use the autofocus and it does not work very well. I don't know enough about the technicalities of how to set everything up I guess.