As for myself, I have a different savings 'plan'. I put aside any five dollar notes that I get and put them in stacks (see below) of 100 (each stack will add up to $500) and to date, I have managed to get quite a bit already. My boyfriend has also supported my fascination (or obsession) with collecting these fives and because he contributes to this, we've converted to a joint-saving plan where we will use it for things where both of us are involved. And why fives you ask? Simply because it's not a common denomination like two dollar notes or ten dollars so it won't be too painful when I have to put it aside.
I know of others who put aside 'gold coins' or that's what we call our $1 coin. I used to do that and got them cute lil tin cans with wordings like 'Poor Student Fund' or 'Shopping Fund' or 'My First Million Fund' and I used to put $1 coins into them and used to get about $200 plus from each can, which I thought wasn't too bad. This is really extra money that I put aside and it's great when I have a decent amount that I could use for a treat.
If you're like me and would enjoy doing fun savings, go ahead and be creative and see how you can make good use of those loose change. But of course, it shouldn't be such that it adds to your 'burden' of making ends meet. It should be something that will fit into your current budget. And if you have lil kids, this is also a fun way to get them into the habit of saving and putting aside money for something that they are eyeing ya.