I am just in the process of starting to do this as we were so overdrawn on a regular basis for so long it was really depressing me. In the end I went to this website monesavingsexpert.com and implemented some of his suggestions including piggybank saving.
I started seeing that the small amounts I was spending/frittering were really making a difference and it was really difficult to keep track of this when we just had one main joint account and one (very empty) savings account.
I use a spreadsheet and put absolutely everything on it. I started with all the Direct debits which I downloaded off my online account. I then added monthly budgets for all things like main food shop, commuting, car costs etc, petrol,cleaner,. I also add any one-off payments which I hadn't thought of as they come in, though I'm hoping those will get less.
This then leaves a certain amount each month, some of this I allocated to the new piggybank accounts and set up standing orders to that effect.
what is left each month gets put (by standing order) into into a new 'spending account' This is to pay for things like entertainment,gifts,snacks,coffee,food & household consumables (not the main shop), stationary,entertainment & meals out, gifts,clothes, toiletries and anything else you can think of that is not on my main budget. The sorts of things that are paid easily by cash and which are everyday sort of expenses.
This spending account is our cash money and has no overdraft so I know very clearly what our weekly budget is. We also write down everything we spend out of the spending account in a book so we can keep track of what all those cash withdrawals are being spent on.
I also joined this website www.quidco.com for £5 a year you get lots of good deals and get money back. I've applied for a couple of credit cards (cut them up as soon as they arrived) and made £65 just for applying.
We have also been really careful about our holiday budget this year and are having 1 week in the UK and no other major holiday
I am hoping that by the end of the year we will not be overdrawn and we will have some savings.
So far it is going to plan, and I really do think about everything I spend much more.