In this entry, Garrick Van Buren posts a simple, elegant way of remembering when to use i.e., and when to use e.g. Unfortunately, his method requires that you know Latin.

Herewith, my method: i.e. is short for, “in other words,” which is easy to remember because they both start with “i.” On the other hand, e.g. is short for, “for egg-zample,” because they both start with the “egg” sound. Sort of. Close enough.