from the srd:
Mind Blank
Abjuration
Level: Protection 8, Sor/Wiz 8
Components: V, S
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature
Duration: 1 day
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)
The subject is protected from all devices and spells that detect, influence, or read emotions or thoughts. This spell protects against all mind-affecting spells and effects as well as information gathering by divination spells or effects. Mind blank even foils limited wish, miracle, and wish when they are used in such a way as to affect the subject’s mind or to gain information about him. In the case of scrying that scans an area that the creature is in the spell works but the creature simply isn’t detected. Scrying attempts that are targeted specifically at the subject do not work at all.
So everything with mind affecting: ie all enchantment spells all phantasms, all pattern spells.
All spells that gather information about the character (most divinations some uses of wish, etc.).
Anything that would detect influence or read emotions or thoughts (a spell that created pheromones that induced an emotional reaction could conceivably not have the mind affecting descriptor).