Hmmm. Go into the past, build a storage space somewhere that is going to be fairly uninhabited and ignored until the current century, and go around the world collecting artifacts, and precious gems and stuff that when I come back to the present, I can "find" and live comfortably for the rest of my life. Maybe enough to buy LJ or something. And make sure the storage space has damned good security, maybe go into the future, and invest in getting the supplies for the secure storage vault there. Oh, and collect old recipes and other interesting oddments that would amuse me, and bring them back with me, without bothering to give them a chance to age.