I'm going with the capsuling and placebo capsules. It seems like twenty minutes to prepare a few handfuls of capsules is a very small investment of effort to do this sort of test. (Although peanut butter sounds like a good idea too.) I've also never prepared capsules of anything before, so I get to do something new as a bonus.
Previously: 5/14/12 (and explanation)
This is the public group instrumental rationality diary for the week of May 21st. It's a place to record and chat about it if you have done, or are actively doing, things like:
Or anything else interesting which you want to share, so that other people can think about it, and perhaps be inspired to take action themselves. Try to include enough details so that everyone can use each other's experiences to learn about what tends to work out, and what doesn't tend to work out.
Thanks to everyone who contributes!