How Distractible Are You?

Just now, I realized I needed my glasses.  I knew they were in my briefcase, so I went to fetch them.  Inside my briefcase, I found my lunch bag and a water bottle, which I hadn't put away from Friday.  I emptied both out, put them into the kitchen, and came back to my computer.  Only then did I realize I hadn't gotten glasses.

How often to you get distracted and forgetful by something related to your original task?