I agree re generic checklists sold by pilot shops - avoid them.
One should always read the actual POH as a first place to look.
However, there is more to the electric fuel pump than meets the eye. Most low wing planes have it after the fuel tank selector valve. I therefore don't see why turning it on (as I have been religiously doing for 5 years) around changing tanks should make any difference. It isn't going to pressurise the pipework in the valve; in fact it will reduce the pressure at that point.