We go through stages of being really goodabout this but on the whole I find it easier and quicker to do most things myself.My older kids make their beds,they fold the clothesthey take off if they're being worn again.They're supposed to put their dirty clothes in the wash basket but that doesn't happen most of the time.
With a large family and older kids among those it would be easy to get the older ones doing stuff for the younger ones,which is what happened with me and my siblings,and the same my Mum and her siblings,but I don't want that for my kids,so make a big effort to avoid it.Sometime I might ask an older one to help a little one with shoes or something similar if we're in a hurry,but I don't want to make a habit of it.
We sometimes use chores as a part of discipline.Harry's such a Kevin sometimes he's lost all his TV,XBox,computer,whatever priveleges and he's basically nothing to do,so I get him to earn something back by doing chores.Everyone's a winner,I get some help,he gets a reward.
Should put all these kids to work but paying them for it's too expensive,tried that one.I do think they ought to be doing something for themselves as a way of learning life skills and responsibility for themself