Best way to move changes between lanes

Hello,

As we all know, on almost every MS Dynamics CRM Project we have three environments on which we need to move our changes or new features(DEV -> TEST ->PROD). Although several ways exist to do it, I would like to know a good recomendation for this practice. In one of my past projects, we usually create a solution per sprint to add all our changes and then we import it to TEST as Unmanaged, subsequently to PROD. However, I'm not sure if this is the best approach or if there's another best way to do this.

Suggestions will be appreciated.

Thanks in advance!