Notice the spark: When you receive a favour (a ride, a fix, a quick pointer), say thank you, and mentally mark it as your trigger.
Pick a tiny, useful help: Within 48 hours, help a third person with something small - share a template, carry a bag, explain a step, hold a place in line, verify info in a group.
Close the loop, quietly: Do it without fanfare. If it feels right, add a gentle nudge: “Someone helped me yesterday - thought I’d pass it on.”
In the next 24–48 hours, do one micro-help (carry, clarify, connect) for someone - not the person who helped you.
Ask before helping (“Would this help?”). Respect dignity and privacy (no personal data, no unsolicited advice). Stay within your skill - don’t handle medical/financial/legal matters unless qualified; point to credible resources instead. If a one-off help turns into ongoing support, agree clear boundaries together.