everything I sign up to can have a personalised email address e.g facebook@mydomain.com or massdrop@mydomain.com
You can also do this with GMail - if your address is bob@gmail.com, bob+anystring@gmail.com and bob+anystring2@gmail.com will reach you (ie you can put anything after +).
This is a useful tip. However, I find that many sites do not accept email addresses with + in them.
In the past I also found that I sometimes could not remember what I had added after the +, or even that I had put a +, so I could not sign in. Now I use a password manager so this part is no longer a problem for me.
How frequently do you think you *should* check email? You can also say how frequently you do in comments.
Personally I'm sold on thinking you should check it around once a day, not necessarily without fail. That increases focus on both email and non-email, and minimises getting sucked into distractions. But some people I know disagree. Some believe in getting notifications whenever a new email comes in.
For anyone who'd like to check email less often and uses GMail, I recommend using http://inboxpause.com/ and this full screen compose link: https://mail.google.com/mail/u/0/?ui=2&view=cm&fs=1&tf=1&shva=1
Edited to add: I'd recommend everyone at least try checking only once a day, at least for a few days, to see if you find it more productive and/or relaxing. That'd be a big enough win to make experimenting worthwhile.