Where do you write down and process your ideas??

I feel that you are less seeking a tool, and more a system. Check out Getting Things Done. Amazing system. Used it for the past 12 years.

I use Emacs and Captures. Basically, to generate a Zettlekasten. roamresearch is app for the same idea with some additional features. I think it's less about what you capture, and more how to generate ideas. The technique likely works best for academic papers, but something about the why of cross-referencing works for me.

Notion for everything. Ideas, notes, tasks board, bookmarks, everything

I run a problem validation platform - needgap, so most of my days are spent on coming up with ideas to solve the problems listed there and so I write it down directly there and get feedback directly from the people whose problem my startup idea solves.

If you want to validate your startup idea, if it solves any of the problems at needgap (or) if you get a new idea to solve them; feel free to join the discussions.

But note, problems are the first class citizens at needgap, not startup ideas, so the ideas must be in comments and only problems can be fresh posts.

I use Uclusion because then I can collaborate on the idea, propose it and work on it as a development story all in one flow.

Notions - for strategic plans, brain dump, and goal setting

Docs - for a specific individual actions

Squid hub - storage of downloadables

Note pad - for daily to do

Still trying to perfect the system. I struggle a lot with information retention.

Google Keep. Basic. Raw ideas.

And whilst working on something else, it stays there, unrefined - so I can focus.

Otherwise these ideas are way too distracting.

On the go, I use the iPhone notes app, and when I find the time I go through them at home and decide what's useful and what can be deleted. The useful notes I would then add to roam (roamresearch.com).
When I'm at home on my laptop, I use roam straight away. What I like about it is that there's no mental overhead of "Where does this piece of information belong to in my hierarchy of pages?". You just start typing in the daily notes view and can create a new page or link to existing pages bidirectionally using the [[]] command.
Every now and then I also just use pen and paper at home. I tend to do this especially when it's something that requires creativity while I write. Using pen and paper has this magic to it that typing on a laptop keyboard can't give you.

iPhone Notes app or paper cards.

If I want to explore an idea, I put it on a whiteboard.

For turning ideas into product, I use Typora or Google Docs (depending on whether I need to share the doc).

I'm using coda.io, I usually write quick ideas into card style table and separate table for every idea when I start working on details and planning.

I am using Notion and my Notes app on my Mac @benpaine. I also keep a pen and notebook by my side throughout the day to jot down any ideas that spring to mind. I also crowdsourced some of the IH community's favourite note taking apps a while ago. You can check it out here

I use Notion for quick notes, design system, dev snippets, and as a board (like Trello) to track my project progress.

Spreadsheet + I created this http://openhustles.com/ last week, to validate the idea

Microsoft ToDo - To quickly write my ideas, even in offline mode, when in a laptop or mobile phone.

Trello - To seriously manage the ideas from my ToDos, usually in 1 board, it contains 4 cards (Ideas -> ToDo -> Doing -> Done).

I use mindmaps. I wrote an article about idea generation on my blog, and I describe my technique to retain them around half of the article. Search for "A Real Life Example of an Idea System".

Basically I have a mindmap synchronized with Nextcloud on one of my server, and I write any idea in there, categorized.

I go very often in there to delete some, too. This is the most important. Otherwise, you have too much clutter.

When some category or "bigger" idea are more fleshed out, it becomes a project. Then, I'll go on the Internet see if it could work.

I always grab my iPad with the pen and use OneNote (Microsoft) that syncs to my phone and laptop. There’s something about writing on (digital) paper, especially when it’s limitless and easy to organize. Before that, I was happy writing in an actual notebook, but that is way harder to organize and sift through as your content grows.

roamresearch.com

I use a combination of Things, Trello, and Notion. Notion is becoming a bigger and bigger part of my workflow because I use it to journal as I work through projects. It helps me to understand where I spent my time, especially if I haven't actually pushed out new features for the day. I create "Toggle lists" for each day and so it doesn't matter how wordy I was, I can always hide that text and have a clean looking page to get my bearings. Being able to throw screenshots with captions in those journal entries feels like a superpower.

I use both notion and ting but I still go scratching stuff down in a paper notebook and on my ipad pro.

I used to have a list of projects in Things by cultured code and really enjoyed how nice it was to sort. But it didn't help with prioritisation or fleshing out at all.

Joplin. Things to love:

• markdown
• open source
• clients for desktop + phone (sync)
• you can self-host it

I use the notes on my iPhone if I'm on the go and then I like to organize everything on Trello. Because that way I see the ideas that I have "to do" I like the flow of moving things forward if that makes sense :D

personal notebook (moleskine) all the way.

I use Google tasks because I can turn emails into tasks and access it from my phone pretty easily. It also means its open in front of me all day so I always have a cursory glance over my backlog, upcoming deadlines, and ideas.

I would say that anyone making lists should consider holding on to them loosely. Other than external deadlines/requirements, I am extremely liberal with deleting things from my lists, splitting them into small tasks, or otherwise letting them go. It means that my list isn't a source of anxiety, it's only a tool to store temporary ideas, not a taskmaster.

I use Google Keep to capture ideas and Google Docs to flesh them out.

I go for Evernote and also Notes for iOS. When I quickly need to sketch something, I go for the traditional and unbeatable pen and paper method.