The fewer emails cluttering your inbox, the easier it will be to find those messages that you really need. Believe it or not, purging records when they are eligible for destruction is good records management. Don't know where to start?
Email messages can split into multiple conversations, can exist in different versions, and can be one of many copies as they are sent or forwarded. Generally speaking, the author of the email is responsible for maintaining the official copy for retention purposes. If you are the email sender or if you have modified an email that you've received, you should consult the records schedule for how long to retain the message.
Take stock of the committees or organizations you're involved with, the projects you're working on, and the folks you typically correspond with. Use these areas of your job as a way to group messages together.
To help you manage your email, consider creating rules that automatically delete messages from certain email addresses or domain names, or ones that automatically move messages with a certain subject line to one of your folders. Microsoft Support provides step-by-step instructions, but there are also numerous YouTube videos that can guide you through the process.