Things to plan for a wedding without a date?

I would say to start looking at dresses for yourself and your bridesmaids (not necessarily buying one yet, just seeing what's out there). You should also choose your colours because it will help with choosing bridesmaid's dresses. You and your fiance should also start to think about who you would like to ask to be in your wedding party (maid of honour, bridesmaids, best man, groomsmen, flower girls, page boys) so you can start to ask people if they'd like to take part. You should also think about whether you want to get married in another country or state to where you live (or think you will move to) so that you can have a look at venues and get an idea of what you would like.