Usability: little tips

This could include graphic design and user interface and user experience tips. I'll let it be a grab-bag of ideas. Basically these are little big details ;)

• A "help me decide" link I saw in visual studio just now was a) a good idea and b) good wording!
• Don't go completely black or completely white
• Design Guidelines: 7 practical tips for cheating at design -- and as twitter thread
• When using a gradient of color in a graph/chart/map -- don't use a full rainbow. It's confusing, interpreted differently by most pairs of eyes, and the luminescence is particularly not monotonically increasing or decreasing. see Rainbox Color Map (Still) Considered Harmful
• Web desgin in 4 minutes
• UI/Design Quiz

Elements are:

• Space
• Line
• Shape
• Color
  • sets (color-schemes)
  • gradients gradients in UI design
• Font
  • font face
  • style
  • kerning
  • line space
  • height
  • weight
  • Sets (font-pairing)