Well, it is a very positive sign that you reprocess this experience in the dream state!

Clearing my mind by actively silencing it helped me tremendously in the process of letting go. This was necessary for me in the beginning because my mind was too chattery to simply stop it, and more importantly these thoughts are linked to the memory of unhealed energy. We usually recprocess such traumatic events in the dream state but most feel rather "haunted" by these dreams, which often entails that people have these dreams their whole life because feeling "haunted" is a state of suppression where energy gets stuck in us.
For me, actively clearing my thoughts was the way out of outdated thought patterns and after some time I released them in the dream state. Whenever I released the thoughts' energetic essence in the dream state, I woke up shortly afterwards and felt the physical release, I literally felt how my body releases density and became lighter..step for step more :)

So yes, of course you can talk a walk in nature or do anything that helps you to clear your thoughts. But personally, being aware of the effect such events have on us, actively shutting close our thoughts with the WILLINGNESS to let them go was by far most powerful.