Gmail offers some wonderful and simple keyboard shortcuts to help you manage your inbox at light speed.
You can have labels automatically applied to incoming Gmail emails based on a number of criteria - sender, subject line, even a specific phrase appearing in the email body. It's an easy trick to keep your inbox well-organized and manageable.
Email overwhelm is one of the most common technology complaints that I hear from clients. The good news is that if your email is run through Gsuite or Gmail's web interface there's a plethora of simple tools you can take advantage of to tame your email influx.