Can I add to RE's list - if you aren't taught to be organised and look after your things, what hope have you got as an adult?
Yes! So true!

This is something we are having no trouble teaching the little one but I lose count of the number of times I have to tell the big one to not trash books (she really mistreats books, we have HUNDREDS of books and they sort of drift into her room) and to keep her pens and pencils where the little one can't reach them or her stuff gets scribbled on. I always looked after books when I was a kid, they are very expensive and I liked to keep them looking new, not like someone has run over them with a lawnmower.

And it is NOT my responsibility to put her pens and pencils away for her. Nor is it my responsibility to clean texta marks off her stuff.

Edit: our 2.5yo is pretty good at clearing the table after dinner (although she has broken a few plates hurling them into the sink) and making sure our clothes as well as hers go in the wash at bath time