A person who shares knowledge multiplies something without losing possession of it.

Teach someone what you know and you still know it. This is one of the few things in life that genuinely multiplies rather than divides, and hoarding knowledge to preserve your position is both mean and unnecessary given how it actually behaves.

Pick one thing you understand well and pass it on this month, properly, to someone who would benefit. Not a hint, the whole thing. You will lose nothing measurable and you will usually find you understand it better afterward.