Some ways to earn sats on nostr:

1. Be helpful
2. Post memes
3. Share media content (funny, inspiring, interesting)
4. Analyze current developments and share your take on them
5. Share useful tips
6. Live stream on zap.stream
7. Upload interesting content to flare.pub
8. Post recipes to zap.cooking
9. Hold audio meets at nostrnests.com, cornychat.com, hivetalk.org
10. Sell stuff on plebeian.market, shopstr.store
11. Create music on https://stemstr.app/
12. Highlight high signal content on https://highlighter.com/
13. Share exclusive content on https://creatr.nostr.wine/
14. Curate content and add it to https://pinstr.app/
15. Create clips on fountain.fm (now integrated with nostr)
16. Make someone smile
17. Shitpost 
18. Just be active and be yourself