On quiet market days, there's actually free time to browse projects with decent early-stage backgrounds. The most cost-effective approach is still the check-in type; spending five or ten minutes a day on it, there's no need to expect too much, but if you happen to hit a big or medium-sized reward, the overall returns are quite good.

Currently, I am participating in check-ins for Brevis and Billions. The Billions project previously had an opportunity for a new coin issuance, with a financing scale of around 100M, and the experience feels quite interesting. Instead of idling around, it's better to take on these promising projects and give them a try—after all, the cost is just a bit of time.