I check my e-mails only a few times a day and don't go near them for about 90% of my working time.
When checking my e-mails I either quickly respond or if I need to action any of them I turn them into tasks BUT I don't put these task list. I PUT THEM IN MY CALENDAR!!
My calendar is just full of my work load including meetings but also work tasks and even when I check my e-mails.
So far this is working really well. It has made me happier.
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