I posted this on another thread, and I think it will be great for this one. Last year we saved money for the boys by putting all of the change we had in our pockets in a water jug, everyday. Sometimes we would put $1 bills in it too. All in all before we left the boys wrapped up all of their change and took it to the bank the had a whopping $400 + their allowance that they had saved up.
This year we are doing the same thing, we started the water jug early this year and they have already saved $350. I think it's alot but we will be there for 15 days this year.
They truely appreciate the money much more, and are much more cautious about what they spend it on it you let them know they only have X amonut of money to spend.
As far as gifts for others, we usually purchase items at the
Disney Store or the World of Disney NYC, ahead of time. As well as using some of the left over snack credits at Goofys candy kitchen.
Hope this helps