I'll take a pot shot at staying on topic:

I like to put Rasberry Preserves first, because that's the only kind I can find that still has the seeds in it. The seeds add so much flavor.

I put the peanut butter on second, and on the other half of the bread (Spreading them both on the same slice of bread is far too difficult)

I always do the jam/jelly/preserves first because all it takes is a quick rinse and the knife is clean for the peanut butter. If I do the peanut butter first, the cleaning process takes longer, and I don't procrastinate when it comes to eating.