Frank Chimero has taken my musical time capsule concept to a whole new level with music diaries:
At the beginning of 2011, I started a music diary on Rdio. I’d make a new list of frequently listened-to songs each month, and ledger them into a playlist without worrying about how it all sounded together. It was a garbage plate of music.
[...]
Now, as I start the first list for 2013, it feels like I’ve stepped into a time machine when I glance over previous months and years. Sticking a song to a month and year turns it into a more spacious memory palace.
I've quickly fallen in love with several songs from his 2012 shortlist, like Beach House's "Other People" and Bat for Lashes' "Marilyn". Both artists I'd never heard of before.
I wrote about Rdio a few months ago, and the more use it, the more I like it, especially given its social features.
I'm definitely going to start making music diaries. You can subscribe to Frank's playlists via his Rdio profile. My profile is here.