Your big day could be costly even if you're lucky enough to have parents helping you out, so you should set a budget and then try to stick to it. When setting your budget make a list of all the possible upcoming expenses and then allow an amount for extras - there will always be something you forget.
Be realistic about what you can get for your budget. Break down it down into sections - bride, groom, bridesmaids, venue, reception etc. Although at first this can be daunting it is the best way to keep track of how you are spending your money.
If you're a female and decide to change your name, make a list of all your bank accounts, credit cards, store cards, savings and investments. Remember to include any bills you hold in your name. Don't forget to change any official documents such as passports and driving licences. You will also need to contact your local council to have your name changed on the electoral roll.
Most companies or organisations will require a certified copy of your marriage certificate to process your new name, so it's a good idea to get a few copies done at the same time. Most will accept a certificate certified by a solicitor or bank/building society.