I had set myself a goal not to check e-mail today and start a new routine of checking it Mon-Wed-Fri just once. There is no need to check it every day or worse still, multiple times per day. It simply comes down to work for works sake (WFWS) for me. It could be different for you of course.
What do you consider your biggest distraction? The thing you end up doing just for a short time which turns into hours and swallows up your day before you know it. It could be surfing the web, Twitter, Facebook or chatting online. See if you can last one day without doing it.
Notice any feelings or cravings you have. I swore I would last the day without checking my inbox and I couldn’t manage it.