A friend of mine just got engaged and her now fiance had the cutest idea that I thought I'd share for anyone planning on proposing.
There isn't always someone there to take a picture of you two during or after the proposal so this is what my friend's bf did...
They were on vacation and he found a pretty spot, asked her to take a picture with him so they could get the view in the background (you know, the cheesy hold the camera out a take a picture of yourselves type). In the picture he had the engagement ring on his pinky and his arm wrapped around her shoulder. He told her after the proposal so they'd always have that moment in a picture - it's so cute!