This is how it manifests:

I decide to water my garden.

As I turn on the hose in the driveway, I look over at my car and decide my car needs washing.

As I start toward the garage, I notice that there is mail on the porch table that I brought up from the mailbox earlier.

I decide to go through the mail before I wash the car.

I lay my car keys down on the table, put the junk mail in the garbage can under the table, and notice that the can is full.

So, I decide to put the bills back on the table and take out the garbage first

But then I think, since I'm going to be near the mailbox, when I take out the garbage anyway, I may as well pay the bills first. 

I take my checkbook off the table, and see that there is only one check left.

My extra checks are in my desk in the study, so I go inside the house to my desk where I find the can of Coke that I had been drinking.

I'm going to look for my checks, but first I need to push the Coke aside so that I don't accidentally knock it over. I see that the Coke is getting warm and I decide I should put it in the refrigerator to keep it cold.

As I head toward the kitchen with the Coke, a vase of flowers on the counter catches my eye--they need to be watered

I set the Coke down on the counter, and I discover my reading glasses that I've been searching for all morning.

I decide I better put them back on my desk, but first I'm going to water the flowers.

I set the glasses back down on the counter, fill a container with water and suddenly I spot the TV remote. Someone left it on the kitchen table.

I realize that tonight when we go to watch TV, I will be looking for the remote, but I won't remember that it's on the kitchen table, so I decide to put it back in the den where it belongs, but first I'll water the flowers.

I pour some water in the flowers, but quite a bit of it spills on the floor.

So, I set the remote back down on the table, get some towels and wipe up the spill.

Then, I head down the hall trying to remember what I was planning to do.
At the end of the day:

----the car isn't washed,

----the bills aren't paid,

----there is a warm can of Coke sitting on the counter,

----the flowers don't have enough water,

----there is still only one check in my check book,

----I can't find the remote,

----I can't find my glasses,

----and I don't remember what I did with the car keys.

Then, when I try to figure out why nothing got done today, I'm really baffled because I know I was busy all day long, and I'm really tired.

Thanks to my sister Nancy who forwarded the above in an e-mail. And thanks to the unknown author whose words I've stolen for this post.

Getting old isn't for the faint hearted.