I don’t usually write about individual cool products, but if email is making you crazy this is a product you really want to check out.
It is called SaneBox and it separates your mail for you automagically into inbox, BuilkMail, View Later, and News. You can then train it which email belongs where, though it generally gets things right without training.
More, you can move email to Next Week or Tomorrow and it leaves your inbox, only to reappear when you said.
Further, you can forward to any arbitrary time/date (e.g., Tuesday.firstname.lastname@example.org and it will come back then. Does a whole bunch more, is highly customizable and generally great.
Enjoy, and I think if you sign up we both get a small discount.