I would counsel against this. Changing tanks shortly before departure, you run the risk of an engine stoppage just after takeoff. There could be just enough fuel in the gascolator and carburetor to get you off the ground with insufficient altitude (time) to correct a problem.1) The fuel selector is set to the lowest tank (or lighter side) on start-up and remains there through taxi. It is then switched to the opposite tank on run-up. This tests both fuel systems. For 4-tankers, you might do start-up, taxi, run-up, and taxi prior to takeoff.
I select my departure fuel tank before engine start. I do not touch the fuel selector until I am at a safe altitude, generally my cruise altitude of 5k to 7k ft, and in glide range of an airport.
Similarly, I select my landing fuel tank before beginning my descent. I know of a wreck of a PA-28 that occurred because the pilot attempted to change to the "fullest tank" turning final, even though he had plenty of fuel in his current tank. He mistakenly cut off his fuel, and ended up in someone's back yard short of the airport.