Ways to mark a hiding place

1. With an X. It's a classic, simple mark to remind you of buried treasure.
2. With something slightly discolored. Whether it be bricks or wood panels, having one that is a shade or two different than the others can be a subtle clue.
3. A plant. If you won't be back for a while, than using a more permanent marker like a tree or rosebush is useful. Just be sure that you have a way to recognize which tree or bush you used.
4. A flag. It isn't very subtle, but sometimes you don't need subtlety.
5. A trail marker. Depending on what you're hiding, it may be small enough to hide within your marker.
6. A picture frame. Another classic, which doesn't have to aways hide a safe.
7. With your favorite book. If your hiding place is in a library, what better way to remember where it is than the title of your favorite book?
8. With a rug. If the hiding place is in the floor, it might be easy to cover with a rug.
9. By a landmark. Know a funny rock that looks like a thumb? Why not make that the marker that will lead to your hiding place?
10. A sign. Sometimes, a nice sign is all you need to find what you've hid. Especially if it says, "This is the hiding place".