Age Activated Attention Deficit Disorder. 
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 it needs washing.

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

I decide to go through the mail before I wash the car.
I lay my car keys 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 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 check book 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 I'd 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. 

The Coke is getting warm, and I decide to 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 water.

I put the Coke on the counter and 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 spot the TV remote. Someone left it on the kitchen table.

I realize that tonight when we go to watch TV, 
I'll 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 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 1 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, and I'm really tired.

I realize this is a serious problem, and I'll try to get some help for it, but first I'll check my e-mail....

Do me a favor. 
Send this message to everyone you know, 
because I don't remember who I've sent it to.