Notice what's going on in your heart and in your head as you go through your day. This goes for when you're feeling excited and elated, AND ALSO for when you're feeling frustrated or upset.
Whenever your mind gets stuck on something, or you're feeling quite a bit of emotion, be curious as to why.
What are you feeling and where are these sensations in your body? When have you felt this before? What does this mean to you?
Why can't you put a certain thought away? What feelings come up as you think about it? Do you need to pursue this idea?