Can you initiate a maneuver outside of combat? This is specifically about the Moment of Perfect Mind maneuver, which allows me to substitute my Will save for a concentration check. My GM feels that I should not be able to initiate it outside of combat, since it effectively grants me a Will save that is better than my best save. I don't see why I should not be able to initiate it outside of combat. A Druid can Wildshape out of combat and a Wizard can still cast his spells whenever he wants. My Warblade should be no different.
Martial Maneuvers Are Usable Outside Combat
Tome of Battle puts no restrictions on using maneuvers outside of combat. The text does, however, put some restrictions on recovering maneuvers outside of combat. In the chapter Blade Magic in the section Recovering Expended Maneuvers under the heading End of an Encounter there's this text:
Emphasis mine. Those special actions are described in the same section, so, for example, a warblade recovering maneuvers this way recovers maneuvers more slowly than by using his special action but still might find this way useful if prevented from making melee attacks.
So this is pretty much unambiguous.
The DM's Concern