Don't pour oils down the drain!

Don't try to catch a dropped knife. Back away and let it fall.

Medium rare chicken. Works for steaks, but not for hen.

Coming anywhere near my non-stick pan with metal. If you scratch my pan I will scratch your soul.

Never and I mean never panic if you start a fire on accident, you need to be calm enough to know if you have to smother it (oil or grease fires) or grab the extinguisher. Panicking can get your house burned down

Never pour spices directly into a steaming pot on the stove. The spices will congeal in their containers from the moisture introduced. Instead put the spices in a separate side container then add to a steaming pot.

DON'T LEAVE PASTA IN THE WATER WHEN IT'S DONE!!!!!

guessing at amounts when baking.

Don't cut meat immediately after cooking it, more juices will flow out, the meat will become drier. Wait a few minutes

Glass cutting boards. Like seriously, just GTFO. And in a similar vein, dangerously dull knives. I’ve seen some real bludgeons in other people’s kitchens; no wonder they hate prep work.

Cutting with a dull knife. Get yourself a sharpener, even if it's a cheap one.

I'd like to add to this that you should read and understood the entire recipe before you start cooking. You don't have time to boil water when you need to "add boiling water". And it's nice to have the rice ready when you arrive at "serve with rice".

Don't use a nice knife on anything other than food. (a common offense would be opening a food package with it) Don't send a nice knife through a dishwasher Don't leave a sharp knife in the sink Don't leave a knife wet, even ones claiming to be stainless will often rust if left wet.

Adding salt as a matter of course, or just because the recipe says to. Taste first, and only add if needed. If you've used stock or a stock cube in your dish you might not even need salt, they already have it.

Resting is part of cooking. That bacon you cooked to perfection that's still in the skillet? Yeah, that's too late. You need to remove things from heat a little earlier than you'd think so that the ambient heat continues to do its job. Otherwise you're overcooking it.

Cooking with unwashed hands

Not using enough butter.

never let water touch chocolate.

Cooking everything on "high" because you want it done faster.

Learned this the hard way: don't throw fresh chili peppers into a hot pan unless you want to pepper spray the whole house!

Always wear pants while cooking bacon.

Don’t press your burgers down as they’re cooking. You’re releasing all the juice. It’ll give you a dry ass burger. There are such things as smash burgers, but I believe on those, you smash them at the beginning before the fat has a chance to melt so you’re not smashing the juice out.

Don't grab something that is on the stove without a towel or some type of heat protection

Don't let your baking powder get clumpy. Tiny rocks of baking powder ruin anything you bake.

Cranking the heat to reduce the cooking time will leave you with a burnt outside and an under-done inside.

Cooking with extra virgin olive oil over high heat

Never put oil in the pot when cooking pasta, as the sauce will just slip and slide away instead of sticking to the pasta. Pasta should never, ever be rinsed for a warm dish. The starch in the water is what helps the sauce adhere to your pasta. The only time you should ever rinse your pasta is when you are going to use it in a cold dish like a pasta salad or when you are not going to use it immediately

Do not mix hot cooking oil and cool sink water! I saw a girl burn the hell out of herself because she didn't listen to the Home Ec. teacher. She threw her hot oil in a sink with some cool water running. Boom! Sprayed hot oil all over her arm and neck. Let your oil cool folks.

Remember, you can't get some stuff back after you add it. Go slow with seasonings, and lightly. You can always add more, but you can't take it back. Don't let your food taste like ocean water.