Bootstrap 3 Tips and Tricks
I have a hard time qualifying most of these as "tricks," which would imply some hidden or barely-utilized feature.Most of these are quite explicitly described in the documentation (img-responsive, nested columns, responsive grids, container-fluid are all very upfront in the documentation).And on a UX note, I cannot see any advantage to the animated, slightly expanding prettyprint code boxes.  I don't think this is a valuable piece of UI.