What happens after booking the venue depends on how close to your date you have booked.
If you have booked 15-12 months before your wedding then you need to find and book a photographer, caterer (if applicable), florist, transportation (if applicable) and entertainment.
Irrelevant of when you book your venue in relation to your wedding date, the other thing you will need to do as soon as possible if you’re having a civil ceremony, is to book your registrar. Different registry offices have different rules on how long in advance you can book your registrar and give notice. Some will allow you to provisionally book your registrar 24-18 months before, however, others only allow you to book, provisionally or other a maximum of 12 months before. Once you get to the 12 months before or less stage you will be able to book your registrar and give notice of your marriage.
If you have booked your venue with longer to go than this, then really what you do next is up to you. You can start looking for your wedding dress and your BM’s dresses, and possible ways to decorate your venue.
When looking for photographers, you may feel that it is impossible to find a photographer at a low price. Money can be saved on all of the above areas! One of the biggest ways to save is if you are lucky enough to know talented and generous people who will either be your florist, entertainer, caterer, photographer etc for free/at a reduced price. If you are not lucky enough to know people who can do this for you, then you need to look around for a bargain. Student photographers, or photographers that have just qualified are cheaper than experienced photographers. Opting for seasonal flowers and hand tied bouquets will also reduce your expenditure.
Having your wedding at a later time, means that you may only have to feed your guests once, as opposed to twice, which will help in reducing catering costs, as well as, opting for cheaper menu options, not having canapes after the ceremony, choosing sparkling wine instead of champagne for the toast, not having a buffet in the evening, or having bacon sandwiches instead of a buffet in the evening.
As you plan you will find for yourselves the areas you feel you can save on and those that you really don’t want to. You may decide that you have never been that fussed on the idea of having a bouquet anyway and go give up having flowers at all, or only have a bouquet and button holes and no venue decoration flowers or vice versa.