Oi vei I'm too old for this new site. I forget where I've just been and keep going there over and over again. Starting out with the intention to work my way through those categories and subcategories that interest me, I invariably find myself confused, particularly after answering a question or two. Ed take pity on your elders and fix it so that the links that I've already clicked - i.e. the categories and subcategories that I've already visited - go green or fade or whatever. Not so that they can't be clicked again, just as a trail to refer back to.
i agree with you DaSwede, surely there must be some way the ED can make it like you suggest, it does my head in scrolling back & forward!, and think it would be a good idea to put the topic headings in a different colour to help them stand out a bit from the subtopics, lets hope ED reads the suggestions .