I always forget about turnips and get mad! So I usually just collect things then sell then to Tom Nook..... I also auction off things and after a week or two if I didn't sell it to the users on TBT I usually sell the rest to Tom Nook!
me, i play it safe and sell fruit. i have a policy for myself when selling fruit though. i only sell fruit in the lower part of my town and i leave at least 2 palm trees with fruit. Get`s me about 80K each time. But lately I have not done that because of a secret reason. So I am currently relying on fish and fossils only I`m going back to harvesting fruit by the end of march break though