In addition to the excellent points made in this thread, I'll add another:
If it's going to take me, say, 5 turns to build Oxford University, and the tech I'm currently researching will take 7 turns to finish, and Walls will take 2 turns to build, I'll cue them up beforehand to time things correctly.
Ideally, I should cue up something else I plan on building, switch to Oxford after 2 turns, then finish building the other thing after it's done. But I find more often than not I'll forget to make that switch 2 turns in because I have some many other things going on.
It's just like how I press "Next Turn" and then tell myself to remember to do X when it's my turn again. But, inevitably, a couple leaders will come visit for trades, and I get a pop up that I researched a new tech, and I get a pop up that I entered a new Era, and I get a pop up that I entered a Golden Age, and I get a pop up listing who likes shiny things the most, and I ultimately forget to do X after all that. Having ADD sucks!