Most of us get too much email in our inboxes nowadays. If you have a smartphone you most likely receive emails on it too. The constant notification of a new email arriving can be stressful and, at least, distracting.
A great video I found a while back on Peepcode really helped me organize my email inbox. It's not free, but it's $9 well spent.
Check it out:
The main ideas are: 1) turn off all automatic notifications so you control when and where you read your email and 2) use Gmail