Surprised this one hasn't got a mention around here yet seeing as it's out in two weeks. I love Train and thought Save Me San Francisco was their best album yet although from what I've heard so far California 37 is shaping up to give it some stiff competition. There are a few songs from the album that have been released in full that I think sound great:

Drive By:
To Be Loved (it was in a film a while back but is on the new album):
Feels Good at First:
They've also (so far) released two behind the scenes snippets of two songs. I think a lot of other bands could learn a lot from this kind of thing. Mixing interviews, studio footage and audio of the finished song together - it really builds suspense for the album. More so than just snippets i think:

You Can Finally Meet My Mom:
This'll Be My Year (my favourite so far):