What’s the single most useful hint?

The approximate length and structure. Knowing it’s “a word then some digits” beats a long list of unrelated guesses.

I only remember part of the password — is that useful?

Very. A known prefix, suffix or middle fragment massively narrows the search and is one of the strongest hints you can give.

Only for short/patterned passwords. Blind brute force against a strong password is impractical — hints are what make recovery realistic.

Guided recovery lives or dies on your hints. Vague clues waste time; specific ones can turn an impossible search into a match in seconds.

Here’s how to give the recovery engine what it actually needs.