Many experts advise having an inbox that has no more than 10 email messages. Like with snail mail, a good way to handle your messages at once is by taking the following actions:
- File in a folder.
- Respond.
- Delete.
- Save.
- Leave longer responses for later.
Also consider creating special filters for emails. You might notice a pattern and find it would be better to filter certain messages into a specific folder. For example, if you use twitter, you probably receive messages from twitter letting you know someone is following you. Rather than letting those clutter your inbox, create a folder for "twitter" and filter all messages from twitter.com into this folder.