I've done a few and don't really mind them. They aren't my favorites, but they aren't on my "10-foot pole list" either.
The best advice I can give is to take a few minutes before you start and sit down with the employee who will be assisting you. Make a list of the departments you have to do, in the order you will reach them from your starting point. The goal is to make one circumnavigation of the perimeter of the store, and then make one trip through the interior. That will minimize your walking and should also minimize your time.
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Have PV-500 & willing to travel.
"Answers are easy. It's asking the right questions which is hard." (The Fourth Doctor, The Face of Evil, 1977)
"Somedays you're the pigeon, somedays you're the statue.” J. Andrew Taylor
"I have never met a man so ignorant that I couldn't learn something from him." Galileo Galilei