Filling the gas tank

[Cal Price]

I normally stay sat on the bike and rock it gently from the hip but to be honest, there or thereabouts should be fine especially with the MPG you are getting.

[RedShift]

I agree with Cal.  If getting the most in your tank is important to you, just take your time, rock the tank back and forth, and keep adding until you tire of this exercise.  Low tech, but works.