How do you stay consistent with GMAT preparation every day?

Starting is the easy part, so the routine should be smaller than feels necessary. A fixed time slot works better than studying whenever free time appears, because free time rarely appears. Set a minimum you can hit on a bad day, for example 20 questions or 30 minutes, and treat anything beyond it as a bonus. Planning the whole week on Sunday removes the daily decision about what to study, which is where many sessions quietly die. A visible tracker, even a paper calendar with a cross for each completed day, keeps the streak concrete. The most useful rule is simple: missing one day is fine, missing two in a row is not.