So a while ago I was thinking it would be neat to build a site that had the most absolute utility. The idea I came up with was a site to store those little protips that are super useful, if you know them ahead of time.
I hired a guy to work on it with me, and ClueDB was born: http://cluedb.com/
Please give it a whirl (it uses Twitter auth as login but doesn't tweet anything) and tell me what you think!
(Various trivia: My first try at a project coded by someone else and "product managed" by me. Runs on Flask + MongoDB. Also, this is totally unrelated to my startup.)
My one UI nitpick would be that clicking the "Read another random clue" button takes you to a random clue but that button is not present on the new page. I spent ~5 confused seconds looking for the button again before I noticed the link in the header. In my opinion the button should also be present on the clue page.
If you are looking for some content to get the site started Reddit recently had a huge thread full of hints and tips like this.