What about just drabbles? I can give you a prompt/pairing and you have to fill it within 100 words? I did that for spn_bitesized and it was a good stress reliever and sparked some synapses. Or, it can be like 150 words if you want but no more than 200. They're quick to write but good because you have to figure a way to say a lot in the most concise way possible. :)

I'm almost done with the new chapter of bb. Like, seriously this time. Probably within the next five minutes. Though it sounds like you're in a Sam/Gabriel mood so J2 probably won't help satisfy you. D: