I found work was a habit with more pain than gain, so I gave it up.

One hint that might help: "Start at the end, not the beginning."

In other words, don't put any energy into planning.   Get the rough outline
of the picture together instantly, using primitives if necessary. 

Then look at it, enjoy it, put yourself inside it, imagine what each
part should look like, and start filling in the details.

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