I'm just fascinated by how much I love paced.email by @rikkipitt.
The usability and usefulness of just providing a unique, paced alias for all online services - by just typing the address how I want(!) - is almost too good to be true.
paced.email
I mean, once you have chosen a username you just type new e-mail addresses that are logical, unique and forward to your primary e-mail at the pace you want.
I'm actually not sure I can explain. You have to try it to understand the brilliance.
Also, thanks to @arnklint for telling me about the service.