Things I have thought about today, in no particular order:

Gamma-ray bursts Lightning A heretofore undetected but potentially densely-populated class of objects in the solar system Laundry Why my phone sometimes rings audibly and other times chooses not to The electron column density in a magnetic bubble after a nuclear detonation in the upper atmosphere Ice cream sandwiches Mars Social networking and astronomy Temporarily misplacing my wallet last night Suborbital rockets and their potential for astronomy and tourism My cat

Feel free to do with this information as you wish.