If you're billing each hour of those 12 hour days and can't make ends meet, then you have a problem managing your finances.
If you're salaried and would lose your job if you didn't pull those hours, then I assure you you can find a more reasonable job.
If you're struggling to get a business off the ground, then I doubt that you're getting as much done in the long run at 12 hours a day as you would at 10.
12 hour day crunches can be effective if you do them for a couple weeks; after a month or two the tortoise that stuck with a 40 hour week is probably going to beat you.
At least that's true if you're writing code - longer days can still be semi productive if you're doing softer work.
If you're salaried and would lose your job if you didn't pull those hours, then I assure you you can find a more reasonable job.
If you're struggling to get a business off the ground, then I doubt that you're getting as much done in the long run at 12 hours a day as you would at 10.
12 hour day crunches can be effective if you do them for a couple weeks; after a month or two the tortoise that stuck with a 40 hour week is probably going to beat you.
At least that's true if you're writing code - longer days can still be semi productive if you're doing softer work.