Set a Budget: When it comes to figuring out how to plan a wedding—you’ll need to decide how much you can spend on your wedding. It might not be the most fun part of the process, but it’s a task that really needs to be completed first. The last thing you want is to fall in love with a venue, vendor, dress, etc. and realize it’s completely out of range. So sit down with your parents or other potential contributors to come up with a total budget, and then divide it up by vendor or service accordingly.