If you have the means, buying Starseed Boosters will make all of the methods in this guide much more efficient, so we have to mention them. The basic booster is a 20% boost for 30 days, costing 800 Lumina (~$8USD), and the advanced booster is a 40% boost for 30 days, costing 1500 Lumina (~$15). The two effects stack, giving a bonus of 60% more star seed for 30 days for the price of 2300 Lumina...