Claim
A limit is a number decided sober, in advance
The impaired instrument cannot set its own limit, which is the whole argument. So the limit is written before the event, in standard drinks, with the stopping point attached to something external rather than to how you feel.
Three drinks, then water. Two at a work event, no exceptions. None on nights before training. The form matters less than the fact that it exists in numbers and in advance, because at the moment of the fourth drink you will not be constructing a policy, you will be reading one.
Action
Write the plan for your next three events
Take the next three occasions in your calendar where drinking is likely. For each, write the number, the stop signal, and how you are getting home, decided now.
The stop signal is the part men skip: order water after the last one, switch to the non-alcoholic option, leave at a stated time. A number without a signal fails, because the last drink and the next one feel identical from inside. Send yourself the plan as a message so it is on your phone rather than in your memory, and do not renegotiate it in the room.
Evidence
Driving arithmetic, and why the morning is the trap
Clearance runs at roughly one standard drink an hour and does not accelerate. Six drinks ending at one in the morning is therefore not clear by seven, and a man who feels fine at seven is a man whose self-assessment has been impaired since before he went to bed.
Legal limits vary widely, from zero tolerance in several countries to 0.08% in the United States and much of Canada, with 0.05% common across Europe, so know the number where you are. The workable rule is simpler than arithmetic: if you drank past your limit, you are not driving in the morning, and the decision about that is made when you book the taxi rather than when you wake up.
Evidence
What a hangover actually is
Not just dehydration, which is the folk explanation and the reason water alone does not fix it. The main contributors are acetaldehyde, a toxic intermediate produced as ethanol is broken down, an inflammatory response, disrupted sleep from day 1, and low blood sugar.
That explains what does and does not work. Water helps with the dehydration component only. Food and sleep help. Another drink delays the acetaldehyde stage rather than resolving it, and paracetamol with a liver already processing ethanol is the one thing to avoid. Mostly it is time, and the amount of time is set by the amount you drank, which is the only variable you control.
Action
Screen yourself with three questions
The AUDIT-C is a three question screening tool derived from the World Health Organization Alcohol Use Disorders Identification Test, used in ordinary clinical practice. How often do you drink. How many on a typical drinking day. How often do you have six or more on one occasion.
Look it up, score yourself honestly, and read the threshold. A screening tool is not a diagnosis, and a raised score does not make you an alcoholic. What it does is tell you whether a conversation with a doctor is warranted, and the score takes two minutes to calculate. Do it today, with your day 1 numbers next to you rather than from memory.
Caution
The signs that are not about volume
Men measure themselves by how much they drink, and the signals that matter are mostly about the role it plays. Drinking alone to change how you feel. Planning your week around it. Becoming defensive when anyone mentions it, which includes being annoyed by this paragraph. Being unable to stop at the number you set, repeatedly. Anyone close to you having raised it, even once, even lightly.
If you recognize more than one of those, the next step is a conversation with a doctor rather than a harder resolution. It is a medical matter with effective treatment, it is common, and it has nothing to do with willpower. Nobody needs to know you went.
One specific thing to know before acting on anything in this course: alcohol is one of the few drugs where stopping abruptly can be medically dangerous. If you drink heavily every day, do not simply stop tomorrow. Withdrawal can cause seizures, it is managed routinely and safely with medical help, and this is the strongest reason to make the appointment before the resolution.
Aside
The outcome this course was built to allow
I will say the thing this kind of material usually leaves out. If seven days of this ends with you drinking nothing, the course worked. That is not a consolation prize and it does not need to be framed as a health decision or explained to anyone.
The argument has been the same throughout: know what the substance does, count in units rather than in impressions, decide in advance rather than in the room, and never make anyone else account for their glass. Those four hold whether your number is zero or four, and they are the only things in this course I would defend in every country and at every table.