One thing about FP runners I did not see mentioned here is "energy conservation". Not for society, but for kids.

I am a high energy person who walks 30 miles a week for exercise. I
like it. When I am the runner it saves my kids' legs so we can have more park hours late in the day.
Here are some tips for runners:
1. Rides - If there is a ride you do not want to do, that is a great time to get your FPs. I do all rides at DLR - except Star Tours. If my kids want to ride Star Tours, I try to time it for a FP pickup window so I can get FPs while they are riding.
2. Bathroom breaks - Family bathroom breaks can take awhile. Great time to get FPs if nature is not calling for you personally
3. Meals - For counter service restaurants, I give my order to my family for food and let them wait in line and order for me, and I go get FPs
4. Shopping - I am not a shopper. When DW or kids want to shop, that is a great time for me to get FPs
5. Parades - We grab a spot 20-40 minutes early (depending on the parade), and I go get FPs while everyone relaxes at the parade route
6. Park departure mid-day - When family leaves to the hotel for an afternoon break I use that time to get FPs and often hop into the opposite the park to get FPs as well. Then I head back to the hotel and join my family for the break.