Here are some tips and tricks I learned while playing the game that you may not know yet!
1. Ghost Task
If you like playing super late like me, you will come across a ghost on your island. He asks you to collect his spirit for a reward: something new or something expensive. I've heard he has no concept of what is expensive so I pick something new.
2. Planting Mom's Fruit
When you move to your island you get fruit from mom in the mail, plant it! It's fruit that you don't have on your island, so now you have two types of fruit!
3. Careful Shaking Trees
You might make a wasp nest fall and if that happens, running inside somewhere or quickly catching the wasps with a nest will help you escape. If you get stung, talking to a villager will get you the DIY recipie for medicine.