Once you get onto the third island, make your way to the volcano, when you reach the peak, set up plans and place a bed in any available space, now continously mine the "ore" or "obsidian" there to raise your skill, and when you;re tired, just sleep on the bed. (YOU CAN ALSO PUT A STOVE HERE TO COOK THINGS TO EAT, OR JUST EAT THEM RAW.)

apart from the volcano summit,go to the crystal island(emerge after u repair the forge), keep harvesting the fine sand/clay there(just fast-forward the harvesting part)..whenever u gets tired/hungry, just send an SOS to the aliens to max your motives, and then continue to harvest..

to send SOS to aliens, put your radio in the weird circle surrounded by the fireflies, repair the transmitter and just send an SOS..

Okay. All you have to do is cook the following:
-Yam
-sugar cane
-honey

once your sim is done cooking, there should be something like "There's something about this that makes you feel good" or something like that. And tiny white stars should appear from the food and when your sim has eaten the food, the tiny white stars will also appear from his/her mouth.

When you cook something else and tiny hearts appear from the food, socialize with somebody and they will agree to whatever you do. For example, whenever you want to "Friendly Hug" somebody, they don't want to do it or when you want to "Backrub" somebody, this time they will always agree (while the tiny hearts still last, that is). One cool way to use this is during a proposal. THEY'LL NEVER REJECT YOU!!