If you and your girlfriend love spending time outside, devise an elaborate scheme to propose against one of Mother Nature's many gorgeous backdrops. Hike together to the summit of a mountain and propose at dizzying heights, or if you enjoy camping, pop the question after reminiscing around a campfire late at night.
No matter where you decide to get engaged, add a few thoughtful touches to the surrounding landscape to make the occasion even more memorable. Hang battery-powered tea lights from the branches of a big tree to set the mood. Wait for dusk to arrive, and in the midst of 100 twinkling lights, ask your girlfriend to be your wife.