I read a book by Alvin Hall "Your Money Or Your Life". Alvin has some podcasts on Money.uk.msn which you can download. The book is available from your local library (I expect most will be able to order it from group stock) or bookstore.
Having read that book, I concentrated on sorting out debts, such as paying off credit cards (Bad Debt)... and now my only debt is my Mortgage (which Alvin considers is Good Debt).
I am careful about what I spend money on... I used to buy lots of DVD's, these days I rent two a month and avoid buying any. It's the small things that can add up... I don't buy magazines or newspapers now - the Internet is now my source for news on every topic imaginable.
I used credit cards to pay for things and pay off the bill each month... that way I get the benefits of a credit card, without the cost.
I aim to save some money each month into a savings account. It's my rainy day fund. Once you start putting money aside each month, you get used to not having it.
Set yourself goals and give yourself rewards. Start off with mini-goals, so you can see how you can achieve small savings, then as you get into it, increase your goal amount.
I care for two children under 5 and at work I have a weekly budget for activities/outings/misc supplies. We don't always stick to the budget, but by having a budget you do get used to finding lower cost activities. So setting up budgets for various things can help.
Never got shopping without a shopping list. It's my biggest problem... I keep forgetting and end up getting lots of things I want, rather than things I need!