In DBT I am learning about opposite-to-emotion action. On the surface, it may look like "fake it till you make it," but the big difference is, you're not denying your true feelings. For example, if I'm feeling sad and want to choose to act opposite, I might put on upbeat music. But I'm still acknowledging that I'm feeling sad. I'm not telling myself, "Hey, I feel great! I'm happy as a clam! Rock on!"

Similarly, getting up and going to work when you don't want to, staying at the party even though you feel like leaving, etc, are "opposite to emotion" actions. But they are done by choice, not because you're denying how you really feel.