This question is regarding Dopamine and possible ways to cause some related trigger or spark.
Now, the concept/objective is to get into that "motivated/fun/interested" state. So, you feel some what energetic, and that a lot of things around you are very engaging. You feel good doing it, and You want to do it and you enjoy doing it.
e.g: Room: -> Books* -> Trigger some spark that makes me feel very motivated and "up", I enter this state oh I should read that book, no wait I'l read this book first, with the feeling of passion and that.
Now, weather it is placebo, placebo is still placebo and fine or whatever you would like to call it.
Overall: May you please suggestion some actions to do (food,audio,visual,action,thinking,etc) that would help trigger some boost regarding Dopamine.