I think the best way to save money is to sit down and do a budget. You can buy a budget planner for a few euros over the internet and it is money well spent. You should record all your spending on a daily basis for a few months, it's a real eye-opener.
Make a list before you shop and don't shop when you are hungry, you will invariably buy items you don't need.
Pay bills as soon as they arrive. For utility bills, you can pay a little every week, which lessens the blow when the bill arrives.
Buy second-hand whenever possible. Items such as bicycles, toys, game consoles, furniture can be bought for much less. Check out the Buy & Sell website.
Shop around for car insurance, home insurance, mortgage protection insurance etc. There are substantial savings to be made.
Pack lunches for yourself and your children instead of buying.
Do switch credit card companies and transfer balances to avail of zero interest rates,
Check the MABS website for a budget planner and other useful tips and if you think you need help negotiating with your creditors, contact them for advice. They will intervene on your behalf of help you to do it yourself.