The biggest force multipliers what a friend described to me as a young teenager as "be an and" - don't just be a programmer, be a programmer and a lawyer
Don't just be a welder, be a welder and a baker
Don't just be an engineer, be an engineer and a writer
Etc
You may have heard Scott Adams call it a "talent stack"
Same concept
Be exposed to as many ideas as possible (both good and bad), so that you can draw metaphors and connections between them - and know when you're seeing yet another example of a bad idea, so you don't waste more time than necessary moving to a good idea