1. The stardust and moondust help in increasing the skill or strength of the tribe and also help in building build faster.
2. Do have a science lab and make sure you tribe learn science skill to increase their technology. if you drop stardust in the science lab you increase about 400 science skill and if you drop moon dust you increase 2000 science skill.
3. When the tribewoman reached 40 years of age they don't wish to make babies. So do make sure when they start reaching 18 years of age start having one in order to expand your tribe people and prevent from getting vanish.
4. When you have a legendary scientist drop them in the fountain because using fountain, relic and mushroom potion and give it to any of the woman with grey hair they will fill young and they can make babies. And you unlock one of the mystery of the island.
5. When they have babies they still go out to work.
To find out more hint of this game My Tribe, just go through http://grubbygamesfiles.com/forums/viewforum.php?f=14
To buy this game My Tribe, just go http://www.retro64.com/my_tribe_game.asp or http://www.playfirst.com/game/my-tribe