From the source
Details That Make Interfaces Feel Better Table of Contents Text wrapping Concentric border radius Animate icons contextually Make text crisp Use tabular numbers Make your animations interruptible Split and stagger entering elements Make exit animations subtle Align optically, not geometrically Use shadows instead of borders Add outline to images Before and after Make interfaces feel better skill Details that make interfaces feel better Great interfaces rarely come from a single thing. It's usually a collection of small things that compound into a great experience. Below are a few small details I use to make my interfaces feel better.
