The antonyms for the word "psyched up" include words that connote a lack of enthusiasm, energy or motivation. These words include discouraged, dispirited and lethargic. While being psyched up can make a person feel invigorated and motivated, feeling discouraged or dispirited can lead to feelings of apathy and lack of drive. Similarly, feeling lethargic is often associated with feelings of sluggishness and fatigue that can make it difficult to summon the energy needed to complete a task. When seeking to be more productive, it's important to identify the things that demotivate or discourage us, and to actively work towards addressing those issues in order to help us stay energized and focused.