TriMark is a simple tool which generates a special bookmarklet to help you hide some secrets:
When someone single clicked it, he will just be guided to the dummy URL you set;
When you triple clicked it, you will be redirected to the real URL.
If you have to place the bookmarklet into somewhere that doesn't support triple-click (e.g. Chrome's dropdown menu), try increase "Time Frame" so you can "click three times" to trigger the real URL.
You can also add this to your favorites to make life easier: