Colors
Create Design with only Black and White Colors
Add one color from image on site or based on theme
Use colors that are part of the same shade family
Bring in Complementary Colors as required sparingly (Use to grab attention)
Fonts
Serif: Have small lines at the ends are mostly used in printed documents
San-serif: Looks good on computers and easy to read
Monospace : Each character in the font uses the same space (Used in IDEs)