Doing too much

It’s a bit of a circular game. You’re available to do stuff, so you say yes, and yes, and yes some more. Then pretty soon you’ve taken on too much, and things start to slip.

At first it’s just a little, barely noticeable. 

Then, over time you get used to it. The slipping becomes normal. Now you’ve gotten comfortable with medocrity in a bunch of areas, versus excellence in a few.