How am I able to perform complex computer or workshop jobs and then act like a bonehead when performing everyday, routine tasks? I’m not the oldest wine in the cellar but I am old enough to know that I should get the car keys out of my pants’ pockets before getting into the car and fastening the seat belt.

It may have been mentioned during driver’s education class when I was 15 years old, but at 15 most of us were so eager to drive that, if we had car keys in our possession, they would be in our hands and not in our pockets. Even so, at 15 you can contort yourself in a tight space to get anything out of the bottom of your pocket. Fifty years and 50 pounds later, it’s another story.

And speaking of getting things out of your pocket, how long will it take to train myself to have change ready when I bring my purchases to the sales counter? Paying in cash, I already know it will come up to so many dollars — and some change. I know this but I wait until the cashier says “… and 33 cents”; that’s not a good time to start digging into your pocket to pull out the change from in between the keys and lint you have there. It’s like a surprise; you mean I need change? Apparently, it surprised me for about five decades before I got the message to be ready. This foresight separates people who are prepared from those that haven’t a clue. Ouch.

Another of my older-age discoveries is that it is legal and physically possible to change the toilet paper roll before it runs out. You don’t have to wait until the last scrap of toilet paper, feebly clinging to the cardboard tube, is peeled off and gone before getting up to inconveniently search for a new roll. You can change it and leave the old roll on top of the new one to finish it off, if you are thrift-obsessed, as you should be with toilet paper. At any time, the tiniest disturbance in The Force will cause the masses to rush out and buy up all the toilet paper with no prior notice, so you have to know how to conserve.

Of course, the above point is moot unless you are sharp enough to check that there is indeed toilet paper on the roll before you sit down. It’s simple to verify, takes only a glance, and pays handsome dividends in the currency of convenience and confidence. Yet every so often, I’m caught with my pants down — I’m sorry, I guess that’s too much information.

And while we are on personal hygiene, how old do you have to be before you remember to get your paper towels in public bathrooms before you get your hands wet? There is nothing quite like messing with the paper towel dispenser, spinning knobs or trying to find the end of a roll, with wet hands. It’s simple to tuck a paper towel or two under your arm before you get your hands wet — if your mind isn’t off in la-la land. And wait, don’t throw out the paper towels before using them to grab the bathroom door handle.

The list is long and extends beyond hygiene. Will I ever remember, when driving a rental car, to check on which side the cap to the gas tank is located before I pull up to the pumps? Some cars have little arrows by the fuel guage pointing to the side where the gas tank cap is located, but I generally look at that only after having parked next to the pumps.

At the gas station convenience store, do you remember to put the sugar or cream in your cup before you add the coffee? If you do, you won’t waste time looking for a mixing stick and you won’t waste a stick. The only good reason to put the cream in after you pour the coffee in a cup is to see the mesmerizing mixing of the hot coffee with the cool cream.

For the full experience, a glass cup facilitates the viewing and a dose of mind-altering drugs will help transform the visualization, but that discussion is beyond the scope of this column.

Anyway, at my age, I’m not exactly sure I remember what the scope of this column is.