I never traveled much. But right now that these initiatives about flying (much) less begin to circulate in the academic world, I definitely think about avoiding flight as much as possible.

For instance, my next academic trip, Rome-Marseille, will be by night bus for the outward journey, and by night train (much more comfortable) for the trip back. That example shows that we should also fight to get a true alternative to them; for instance French night trains have been almost completely suppressed in the last decade.