When to make it shift

[MetroMPG]

Acceleration technique gets a lot of attention, but I'd say as long as you're not standing on the gas as a matter of habit, it's pretty low down the list of things that really influence your MPG.

If you feel like doing some reading, there are a lot of detailed techniques on this page that'll have a bigger influence:

Beating the EPA - The Why’s and how to Hypermile