So I’ve been experimenting with this approach and have a few thoughts. Basically, we are unable to choose to feel good because we don’t see that we are choosing in the first place. When feeling bad, we create a split between the part of us who is feeling bad and the various morals (actualist: you should be feeling good, real world: you should not be feeling bad!). This causes us to feel victimized by the feeling, and our choice is taken from us. The bad feeling is now imposing on us, and we are trying to get rid of it. A struggle ensues.
When you commit 100% to being the bad feeling (no tricks, no pretenses), you realize that deep down you are indeed making the choice to feel bad. Just seeing this puts the power of choice back into your hands, and then you can choose to feel good. And none of this happens through rational thought. The seeing itself happens in a flash.
So to sum it up, being sincere in how you feel, unifying yourself 100% with whatever you’re feeling. And then “choosing” to feel good instead. Sometimes you also have to look at what you’re doing to deny what you’re feeling. And there’s a lot of morality there.