For example, about what amount of savings you want to have by which date, or set a date when you want to have a clear concise description of what kind of house and location you are looking for.
At another date you want to be familiar with all the things that involve buying a house, the documents and what not.
By defining sub goals you keep things real and are able to measure your position towards your goal.
It’s a valid strategy for dealing with complex and long term stuff.