Hyphens are the connectors of punctuation. They join words, they link modifiers, and generally make ideas easier to understand.
Use a hyphen with modifiers (i.e., descriptions) that include the words “self” and “well.”
Some examples:
- Self-conscious
- Self-centered
- Self-assured
- Well-rounded
- Well-adjusted
- Well-dressed
A few other “self” and “well” words that aren’t modifiers, but still take a hyphen:
- Self-esteem
- Self-defense
- Well-being
- Well-wishers