ways to inflict staggered condition to foes without beating them down to zero

[Bran Towerfall]

i was wondering if anyone knew of a way to inflict a staggered condition on an enemy as a combat tactic debuff. seems like a good tactic to prevent the BBEG from performing full-round action, a standard and move, or just prevent charging/running.
dwarf boulder helmet causes staggered for 1 round after bullrush

staggering critical feat with bab+13....
2nd level staggered fall spell.....

This spell must be cast on a creature as it falls, either from a height or after being knocked prone or tripped. The magic of this spell causes the creature to hit the ground particularly hard, knocking the wind from it. The creature takes an additional 1d6 points of damage from the fall. In addition, the creature becomes staggered for the duration of the spell unless it makes a Will save. Each round the spell’s effects persist, the creature may attempt a new Will save as a free action to end the staggered effect early. A creature under the effects of this spell must take a standard action to stand up.

any others?

[Matthew Downie]

Repose Domain

Gentle Rest (Sp): Your touch can fill a creature with lethargy, causing a living creature to become staggered for 1 round as a melee touch attack. If you touch a staggered living creature, that creature falls asleep for 1 round instead. Undead creatures touched are staggered for a number of rounds equal to your Wisdom modifier. You can use this ability a number of times per day equal to 3 + your Wisdom modifier.

[TGMaxMaxer]

Frigid Touch Spell.

My Magus loves it. Staggered for one round on hit, staggered for one minute on a crit.

I also have a Rime Frigid Touch stored in my Spell storing armor, so that if I get surprised with a full attack, they only hit me once. (for pounce type or invisible rogues sneak attack mostly)

[Matthew Downie]

Other spells that stagger a target without a save (generally higher level than Frigid Touch):
- Dictum;
- Fool's Forbidance;
- Stunning Finale;
- Suffocation;
- Overwhelming Presence;
- Terrible Remorse;
- Waves of Ecstasy;
- Energy Siege Shot;

[StabbittyDoom]

Dirty trick, at the GM's discretion.

Slow (1 round per level)

Staggering Blow (1 round; once per 24h per target, vital strike only, you take a to-hit penalty, and they get a save).

Staggering Fist (1 round; like stunning fist, but no-one gets 1 user per level).

Stunning Fist (1d6+1 rounds; requires monk of 12th level or higher)

Dictum (2d4 rounds; only staggers creatures of lower HD than your CL, so not useful for a BBEG).

Of course, all the above is moot if the DM gives the guy a 3kgp ring (Ring of Ferocious Action). 5 uses as a free action is enough to cover the entirety of most fights.