I’ve noticed that when I practice alone I tend to start thinking about the next pose before I’m done with the current one. It’s worse if I don’t make myself a written list of what I plan to do. There I am in my Adho Mukha Svanasana (downward facing dog), thinking about whether I should do Ardha Chandrasana or Parsvottanasana after Trikonasana.
My new bit of self-talk is a reminder that this is what I’m doing right now. Next is next and will take care of itself when the time comes. So what if I forget to do a twist in the sequence.
For some reason I lost the habit of writing down my plan. Time to return to it.
Practice Notes 
Yes I always have to have a plan and it stops me thinking of the next pose. I’ve put the thumbnails into powerpoint slides with a few practice notes on each. I can then print the slides off in handout form for an easy to follow program. Maybe this will wear off – I’m only a beginner