If you go at a busy time, it's busy, so plan to be...

If you go at a busy time, it's busy, so plan to be there at 10 a.m., go straight to the Crown Jewels (no queues) then the towers and have an early lunch whilst the queues build up After lunch enjoy the grounds and any events or take one of the tours! If you've any energy left, go back and see the Jewels again, if time allows!