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>being forced to write as a scheduled event
>with set pieces picked out by somebody else
Muses don't play like that. The best stories come out of small nothing-type thoughts and feelings that just occur in the brain, and are developed and shaped further by the conciousness.
Writing as an enforced habit, to fulfil a quota, is how you get the majority of Mills & Boon romance novels.
Decide to play when the urge hits you and use spontaneity, maybe that'll break you out of your self-imposed Spiderman funk. Have fun, not obligations.