Subnet scheme for transit networks best practices

Hi All,

We are beginning to move away from large layer 2 networks and spanned vlans at our sites. I am looking for suggestions on subnet choice for the new /30 transit networks we will have. So right now for our devices, clients, servers we assign a 10.X.0.0/16 to each of our locations and subnet that into multiple /24's and smaller. For transit L3 interfaces I assume it is best to use networks outside of that /16. Would it be a good idea to dedicate a /24 range at each site for transit use? Such as 10.8.1.0/24 for Site 1, 10.8.2.0/24 for Site 2. Site 1 transit network 1 is 10.8.1.0/30. Transit network 2 is 10.8.1.4/30 etc etc. Any suggestion would be appreciated, we are just trying to make growth easier and avoid future headaches.