This document discusses three tips for improving remarketing campaigns: 1) Set impression caps to unlimited to increase exposure, as ads are rarely served to full caps. 2) Utilize all available ad formats and sizes to reach more users. 3) Extend remarketing membership durations to three times the average sales cycle to persistently retarget customers over a longer period. The document provides data showing the benefits of each tip and recommends analyzing Google Analytics to determine optimal membership durations.