If the recipe says an ingredient is supposed to be room temperature, make sure it’s room temperature! Eggs are particularly important for this rule — room temperature egg yolks break more easily and incorporate better into whatever you’re mixing. And for something like cheesecake, or anything else with high fat content, cold eggs can actually harden the fat and make your mixture lumpy.
I'm happy you got that passive/aggressive thought off your mind.. Cook on, big fella.
#6 Grocery store chills some vegetables but not others, I do what they do.
#9 Mix sauces similar to mixing paint; alternate top to bottom and outside edge inward.
#12 An accurate meat thermometer is a crucial tool. Learned my lesson after I overcooked a good piece of meat.