What do you call a person who has a lot of ideas, unimportant things, all at once?
This is what could bring to mind.
Vacuous: Having or showing a lack of thought or intelligence; mindless. Insipid: Of a person; senseless, lacking flavor. Asinine: Stupid, foolish, or lacking integrity. Inane: Silly, stupid. Absentminded: Having or showing a habitually forgetful or inattentive disposition. Scatterbrained: Disorganized and lacking in concentration. Deluded: Mislead or foolish. Menial: Not requiring much skill and lacking prestige.
Oxford American College Dictionary.