Search: Click in search bar and type in subject or person from message

Select message if it appears in list below, or choose "All results" at bottom

Advanced Search: Click slider icon to the right in search bar

To Field: Include who the message was sent to (any names you recall)

Key Words: Add any important words that are in the message

Date Range: Add in the time frame you would like to search (days, weeks, months...)

Attachments: Check box if your message had an attachment

Gmail: Using Search and Advanced Search