I love how the internet has become this source of weird insecurity for people. "Hmm. When should I turn my heat on? I mean, I feel a little cold, but... I don't know. Maybe I'm wrong. Maybe there are lots of important rules about when to turn my heat on!"

Nah homie, it's OK to just turn it on whenever you get cold. If it's warmer than it needs to be, turn it down a bit. Find what works. It's just a thermostat lol.