When was the last time you deleted a bunch of your email? I spent some time last weekend and deleted about 5k from a combo of my work and personal email accounts. In today's email world, where it's so easy to search for stuff, it's tempting to just let them sit there. Unfortunately, email is like any other clutter and can weigh you down mentally.
While you're at it, unsubscribe from any mailing lists you no longer need. Do you cringe or sigh when emails come through from certain lists? If so, get rid of them. No need to have that negativity in your life.
I also went through my twitter feed and unfollowed many people who weren't adding anything to my life that I needed to. See on a regular basis.