Do you have your own domain? I use email alias (eg WifeLinkedin@domain.com ) with a single alias per site. I send all alias minus the 2-3 I care to a folder.
General aliases are bad imho because it tends (in my experience) to attract spam... One way I get around that, is instead of aliasing @domain.com, I do .a@domain.com, so I use my emails when i subscribe ServiceName.a@domain.com
good balance for me...