One is never too old to change one's ways; learning is always possible.

(mnemonic) Used to learn the cardinal points.

It's better to do something late, than to never do it at all.

(Ireland) Near enough is not good enough.

Alternative form of a watched pot never boils

A process appears to go more slowly if one waits for it rather than engaging in other activities.

Alternative form of you can't judge a book by its cover

Synonym of never fight a land war in Asia

Alternative form of you're never too old to learn

Alternative form of a watched pot never boils