So here's an old and rather well-known infinite attack loop I thought I may as well document in the forum:
Get a
quickdraw shield (which can be equipped as a free action if you have
Quick Draw) with the
throwing property (which allows you to unequip and throw the shield as a free action), get the
Quick Draw feat, and use either
Ricochet Toss (use
Martial Focus if you do not have the Weapon Training feature) or a
Blinkback Belt. In essence you throw, draw, equip, and throw again, ad infinitum, using only free actions.