I do this thing where I'll say to myself "exercise presence of mind now!" I will actively try to avoid spacing off or ruminating and instead try to process all information in my environment without thinking anything about it.
This is great with music or any artistic media one is consuming. It can also be helpful in social interactions so long as you don't get anxiety from trying to focus too much.
I have an issue compulsively ruminating and that's what this is trying to fix. I can only maintain it for so long before my mind does what it will, but the practice helps.
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We seldom realize, for example, that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society - Alan Watts