Simple answer: close the breaker box lid and put a cheap padlock on it. You don't need a tag or special clip. That ensures that your wife or roommate doesn't try to flip the breaker back on while your arm is in the garbage disposal or you are holding the hot wire with your teeth.
You can and should use a test light or DVOM to verify the power is out.
You can and should treat the wires as if they were "hot" anyhow. You should keep a wire nut on the hot wire. Don't actually put any of the wires in your teeth.
Now. You could do all that, but what I do at home is carry a lot of insurance and work "hot". I don't care about 120V or even 240V. I make sure what I'm touching one arm at a time with no ground path through my heart. Don't stand in water. Simply just don't touch the hot wire. I learned to work hot on a piecework job that payed by units completed and that was about 1000% more if you could work hot. And, you can, if you manage the risk. If you mess up 99% chance you'll say "OW" and NOT do that again. I wouldn't play Russian roulette with 1:6 odds. But 1:100 (die from) x 1:100 (mistake) x 10 hours per year (occasional fixes), fine not worth the bother. Far more chance of dying falling off the ladder than electrocution. DON'T stand on rolly chairs.
Now at an uncontrolled job-site, where I'm payed by the hour, 2000 hours/year? NEVER. It's a lot different when you are a company of one vs. many. I know what I'm doing, and while I make mistakes, I can guess how often. If you have more than 0 co-workers, you cannot trust or predict their mistakes.
I uh, have been guilty of similar lack of safety protocols in the distant past. I fortunately learned my lesson by shorting a $900 AC control board and not shocking myself, but needless to say it really is worth taking the time to do it right.
You can and should use a test light or DVOM to verify the power is out.
You can and should treat the wires as if they were "hot" anyhow. You should keep a wire nut on the hot wire. Don't actually put any of the wires in your teeth.
Now. You could do all that, but what I do at home is carry a lot of insurance and work "hot". I don't care about 120V or even 240V. I make sure what I'm touching one arm at a time with no ground path through my heart. Don't stand in water. Simply just don't touch the hot wire. I learned to work hot on a piecework job that payed by units completed and that was about 1000% more if you could work hot. And, you can, if you manage the risk. If you mess up 99% chance you'll say "OW" and NOT do that again. I wouldn't play Russian roulette with 1:6 odds. But 1:100 (die from) x 1:100 (mistake) x 10 hours per year (occasional fixes), fine not worth the bother. Far more chance of dying falling off the ladder than electrocution. DON'T stand on rolly chairs.
Now at an uncontrolled job-site, where I'm payed by the hour, 2000 hours/year? NEVER. It's a lot different when you are a company of one vs. many. I know what I'm doing, and while I make mistakes, I can guess how often. If you have more than 0 co-workers, you cannot trust or predict their mistakes.