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There is a piece of advice, common enough that I have seen it phrased almost identically across a dozen different sources, that says the way to build a habit is to make no exceptions, ever, regardless of circumstances. Sick, traveling, exhausted, does not matter, you show up anyway, because the moment you allow one exception, the habit supposedly starts to unravel. I followed a version of this rule for about four months with a daily writing habit, ten minutes a day, no exceptions, and it worked well enough that I believed in it completely, right up until a week that tested it for real.
That week I had a genuine flu, the kind that makes sitting upright for ten minutes feel like a project. I still tried to hold the no exceptions line, because I had internalized the idea that any exception was the beginning of the end. I sat down each of those days and produced ten minutes of writing that I look back on now as some of the worst, most incoherent writing I have ever done, written by someone who should have been asleep.
What the rigid version actually cost me
The writing itself was not the problem, since nobody was grading it. The problem was what happened after I recovered. I associated that entire week with a low grade dread, and for close to two weeks after I was healthy again, sitting down to write came with a flicker of that same feeling, like my brain had filed writing under things that happen even when you are miserable and should be resting. That association took real effort to shake off, and it made a habit that had previously felt easy start to feel like something to brace for.
Looking back, I think the no exceptions rule confuses two different kinds of missed days. There is the miss that comes from avoidance, where you are capable of doing the thing and you are choosing not to because it is inconvenient or you do not feel like it. And there is the miss that comes from a genuine, temporary reason like illness, a family emergency, or travel that removes the option entirely. Treating both misses as equally dangerous to the habit does not match how they actually behave. The avoidance miss can genuinely spiral if you let it happen too easily. The illness miss, in my experience, did not spiral at all once I stopped forcing myself through it and just let it be a real exception.
Forcing the habit through a genuine illness did not protect the habit. It attached a bad feeling to something that used to feel easy.
What changed after that week
The next time I got sick, months later, I skipped the writing entirely for four days without trying to force a token version of it. When I came back on day five, there was no dread attached to sitting down, and I picked the habit back up within a day or two at the same pace as before. That was a very different experience from the flu week, where I had technically kept a perfect record and ended up worse off for the habit than if I had just stopped.
This made me suspicious of the whole framing of a habit as something so fragile that a single missed day, for a real reason, threatens to end it. My own habit did not behave that way. What threatened it was not the missed days from illness, it was the resentment I built up trying to avoid ever missing a day regardless of the reason.
Where I landed
I still think consistency matters, and I do not think this is an argument for skipping things whenever it is mildly inconvenient. The distinction I now use is whether I am physically or logistically unable to do the habit versus whether I simply do not want to in a given moment. The first category gets an actual exception, no negotiation, no ten minute version done through illness just to keep a perfect record. The second category is where I still hold a firm line, because that is the kind of miss that tends to repeat itself if it goes unchallenged.
This is based on my own habit over roughly a year, including one bad flu week that taught me more than the previous four months of a clean streak did. I am not suggesting anyone use illness as a routine excuse, and if you find yourself constantly reaching for exceptions, that is worth being honest with yourself about. But if you are pushing through a real illness or a real emergency because you are afraid one skipped day will unravel everything, my own experience suggests the forcing did more damage than the honest skip would have. And if an illness or exhaustion is lingering longer than a few days, that is a reason to see a doctor, not a habit problem to push through.
