I know, and that is part of what makes this so hard. Thankfully, I have several ways too cheat:

-I can take days thinking of the perfect path of action for what takes seconds in the story.

-The character is a humanoid avatar of a very smart and powerful entity. While it was created with much specialized knowledge, it is still human-like at its core.

But most importantly:

-It's a story about stories and there is an actual narrator-like entity changing the laws of nature. Sometimes, 'because this would make for a better story' is a perfectly valid criterion for choosing actions. The super-human characters are all aware of this and exploit it heavily.