Recently I noticed how absurdly homogenous my pinned browser tabs have become: Gmail, Google Reader, Google+ Hangouts, and Youtube. I dumped Yahoo's bloated mail client years ago, but I think I'd actually be willing to give it another shot if only to get some of my eggs out of this basket.

Take note, Yahoo: for me, online mail is largely just a pretty interface to a spam filter. Now that your client is sane, this should be your top priority.