The place is huge and you can easily spend 4 hours...

The place is huge and you can easily spend 4 hours here with lunch thrown in. I recommend going straight for the Crown Jewels since the line gets long and you can knock that off your list first. After that take the Yeoman tour. It's a must do thing and its free! But I liked taking it at the beginning so that when you walk around afterwards you have all the stories and information from the tour in your head.