Maybe this is something everybody already does, but it just occurred to me, so maybe it'll help a few others as well:
When I go through my email I read the subject lines and often fall prey to clever copy writers who pique my curiosity.
The solution: look only at the "from" column and zap any that obviously are from marketers, newsletters I don't want to read at the moment, etc. without looking at the subject line.
For me, at least, a time saver.