Clicking Things Twice
I don't know why but I end up clicking things twice to get them to work a lot of the time.
For example, locking a track requires you to click it twice to work.
Very often I have to copy attributes twice before I can paste them.
It's such a pain when you use this software all day, every day for your job.
Scott Moore commented
I have this when importing an After Effects comp. It loads the project and I select the composition i want then it reloads the project and i select the comp again... then it imports it