Terminology

The definitive guide for dad terminology. 

Jhobby: a hobby that, if all goes well, will become a job. When you were young(er), you could just up and decide "today, I am going to join the Army" and later "today, I am going to go to law school" and then "today, I am going to write software" (those were my endeavors that lasted more than a year...a couple of others, like driving a bus and teaching SAT classes, I have left off the list). But, as a dad you have to balance your desire for personal fulfillment with your desire for bank account fulfillment. A jhobby helps you do just that: you explore your idea while still earning your paycheck, and see whether there is a market for the skills you have (or don't). 
 
Physical phlashback: as you age, your body gets older. It is generally pretty simple to keep this in mind. But, occassionally you forget this basic fact, and start behaving as if you were 20 again. Typical examples of when this tends to happen include playing sports with friends, particularly if you have not seen them in a while, or starting a run with a good song. The process of your body reminding you about its present condition happens either in real-time (eg-you can only run fast for a couple of minutes, and then you make it around a corner where nobody who might have been watching can see you any longer and slow down to an appropriate speed) or, much worse, the following morning (eg-you are paralyzed from the waste up and/or the waste down).
 
Tax: Not the income or sales tax (well, they are taxes, too, but they are not optional), but anything that does not help you, your family, your job, or your community is the tax to which I refer. The less time, money, and energy you spend on tax, the better off you will be. If you cannot see a direct benefit to what you are doing to something that is important to you, stop doing it (I stopped cleaning out the gutters on our house to the point where our neighbor asked me if I could pull a rather tall weed from my roof...perhaps I went too far).