Whats the best way to save storage on my mac?

I really regret picking up the 256 gb version of the m1 air, since I’m close to filling up all my cloud storage (google drive & dropbox) and my mac is currently running at 165 gb remaining, does anyone have any idea how I can save more memory?

I’m a writer, so a lot of the files that are on my computer itself are NDAs, contracts, articles/blogposts, and etc.

TIA!