I thought that "GMail's":http://gmail.com/ fast, friendly interface was to blame for my recent relapse in Full Inbox Syndrome. But, now that some time has passed, I think my interest in using the interface was actually what was driving that relapse because, now that using it is less interesting, I have an Inbox with 127 conversations awaiting a response.
Do me a favor? Email me and remind me to answer all my email. Offer a reward or something.