it's incredibly painful but it works with 90% accuracy. ideally can be done in a waiting room or out on nature, maybe a bathtub. do nothing else unless you feel inspired to do it - I bring my notebook to write down any ideas I don't want to lose or sketches I want to remember, but ideally I want to get bored so I can get out all that boredom and just have focus. phones are banned but take it just in case you would ever have an emergency. if you're at home shut it off and don't touch it.