You can prepare when you are thinking of moving in together: make it your own shared place, respect each other’s space, share the responsibilities and make sure you can discuss anything!
Source: Moving In Together @ Ask Men
- How to Know If You’re Ready to Move In Together @ Health – HowStuffWorks
Excerpt: You don’t know how solid your relationship is until you’ve tested it. If you’ve never had a fight, it doesn’t mean you’re a perfect couple; it means you haven’t been together long enough to know what kind of couple you are. Living together inevitably means conflict, and you better find out if your relationship can weather it before you sign a lease.