In addition to taste buds, what should also guide our eating habits?

Food doesn't have flavor without saliva if that's what you're asking. However, what should guide your habits is how you personally feel and what is healthy. If you feel hungry, go for it, but make sure you're eating a healthy amount. Not too much but not too little.

teens need 8-10 hours of sleep. it kind of depends on what time you get up. but prob around 10 or 11 p.m. or 11 or 11: 30 p.m.