1. Sort your inbox by sender to delete several at one time.
2. Take the time to unsubscribe from mailing lists you don't want.
3. Create a separate email for online shopping, so you don't clutter your inbox with offers.
4. Create folders to put important emails into labeled by topic or person.
5. Define rules so that selected emails automatically go into a folder. This is good for newsletters you want to look at later or list serves that you only want to reference on occasion.