Where do you store ideas?

I simply use google keep, I prefer it. because it is accessible from phone and pc

I keep everything (both work and personal) in Notion. It's free if you're a student too!

Pen and paper

Also team Trello. I have a board named "Ideas" and columns "To check", "Checking", "Dismissed" and "Proved". Every idea is a card. And if an idea has not been dismissed I make a new board for it, when I start to working on it.

A sheet of legal size printer paper on a clipboard just under my todo list.

I use Google Sheets and Google Doc mainly because I have access to these on all my devices and can quickly add to them.

I'm using simple text files, one file = one idea.
and each time I have new things about the idea, I add content in the text file.
It's not ideally, but after trying many tools, or it's too complex, or it's useless.

I'll follow this thread because i'm interested too about other answers

I use a web app called clickup, helps me store all my ideas and which ideas im currently executing, and which are back logged for future revisions.

I'm a Notion fan too. I used to use Trello, but no more!

I keep them in MeisterTask

Notion

If you haven't heard about https://notion.so you should really try it! I feel it's what Evernote should have been.

I store them in keep and a notebook. Using the notebook to sketch it out/work through it.

I put everything in evernote and trello cards

If you want to crowd-rank it, this product seems good for it (not my product btw):

https://www.votemojo.com/

I used Trello and I switch to Notion and it's very great to organize my ideas