I use this trick all the time and it works great for me. Another one that I like to use is to think about my retrospective feeling about the thing after having

I use this trick all the time and it works great for me. Another one that I like to use is to think about my retrospective feeling about the thing after having done it. So, in the case of going to the gym, I think about the fact that after having gone to the gym, i've never regretted going. I've never come back from the gym and thought "man I wish I didn't just do that".