How to find a great idea for your next startup

Hi all,
the finding of a great idea is a real pain in the ass nowadays. It looks like everything already exists, all the niches are occupied, and people are satisfied with everything. But hopefully (for us), it's not that right.
I did some research based on my own experience and the successful companies' experience, and collected all the good ways into one list of 23 points.

Here is the list:

1. Scratch Your Own Itch – Solve a personal problem.
2. Talk to People in a Niche – Especially in boring or underserved industries.
3. Ask "Why is this still done manually?" – Spot processes still using pen & paper.
4. Look for Hacks People Use – Workarounds can hide real needs.
5. Explore B2B Software Graveyards – Modernize outdated tools with loyal users.
6. Build for Trends – AI, remote work, creator economy, etc.
7. Use “X for Y” Formula – E.g., “Slack for churches”.
8. Check SaaS Marketplaces – Read reviews to uncover gaps.
9. Reverse Startup Funding – Build leaner versions of VC-funded ideas.
10. Fix Something Broken in a Big Tool – Improve usability or focus.
11. Check Craigslist/Upwork/Fiverr Gigs – Spot demand for tools.
12. Scroll Niche Forums & Reddit – Find repeated complaints and pain points.
13. Browse Job Boards – See unmet tool needs from job listings.
14. Search Twitter for “is there a tool that…” – Find real-time demand.
15. See App Store Complaints – Identify frustrating app features.
16. Watch YouTube Tutorials – Complex things often need simpler tools.
17. Clone a Startup That Died Too Early – Revive good ideas with better execution.
18. Dream Journaling – Capture ideas from dreams.
19. Monitor Product Hunt / IndieHackers / Twitter – Track trends with poor execution.
20. Buy a Micro SaaS and Evolve It – Improve and grow an existing product.
21. Build Where Trust Is a Big Problem – Create tools for verification or transparency.
22. Make a Plugin for a Popular Tool – Extend ecosystems like Notion, Shopify, etc.
23. Do It Manually, Then Automate – Validate a need before building software.

At the end of the article, I list 10 resources/tools that can help too. Please let me know what you think, and if you know another way to find an idea, or a tool, please let me know, and I will add them.

The full article is here: https://marketingstrategies.io/read/how-to-find-your-next-great-and-profitable-idea-23-ways-plus-9-tools

Thanks!