"Someone's In The Wolf", especially when after about 20 seconds of almost silence THAT riff kicks in.
"You've Got A Killer Scene There, Man" is one of these songs where not a lot happens, yet it's still completely awesome.
"Little Sister" proves that cowbells and electric guitars are a winning combination. It also has one of the best choruses of their whole career. It gets even better when Eddie Vedderplays said cowbell.
"Tangled Up In Plaid" is probably the most catchy (and awesome) song about a destructive relationship ever.
"Turnin' On The Screw", the album's opener, has a brilliant riff and awesome lyrics.
"Misfit Love" is a great hard rock song for about the first two thirds, then becomes somewhat more melodic and emotional during the final third. It works brilliantly.
All three the bonus tracks from the Japanese (and some other) versions:
"The Fun Machine Took A Shit And Died". Basically everything about this one is awesome, the title, the riff, the drums and so on. Bonus points for including the following lyric
You're ten pounds of shit
In a five pound bag
"Era Vulgaris", it's a really big shame this isn't on the album regularly, with it being the title track and all, because it's ridiculously good. It also has a guest appearance by Trent Reznor.
"I Appear Missing" is definetly one of their best songs. It starts as a straightforward rock song (albeit a straightforward rock song with Dave Grohl on drums, which makes it better than most other straightforward rock songs), then around the 3 minute mark the song just stops, then comes back, then sounds like it collapses on itself. All of this leads up to an incredible guitar solo, with some gut wrenching lyrics afterwards.
With my toes on the edge it's such a lovely view
I never loved anything until I loved you
I'm over the edge, what can I do?
I've fallen through
"Kalopsia" which uses the soft verse, loud chorus dynamic to brilliant effect. Trent Reznor's special appearance as backing vocalist makes it all even better.
"Keep Your Eyes Peeled" is very reminiscent of Electric Wizard, and yes, it is fantastic.