Disorganised and scatty

I was really disorganised and scatty at work yesterday. It didn't help that the day before was a public holiday so I tried to do two days work in one. My main problem was that I hadn't planned anything and hadn't written in my diary or notebook since I was at work last week. I used to have an excellent memory, I used to be strong and rarely got tired, but those things are now in the past for me.