Being remote means never having water cooler moments. The moments where you chat with your colleagues. I've coined a phrase -Take Five to Socialize - that describes how I build social moments into my virtual interactions with colleagues and customers. I'm not sure how that this qualifies as an actual technique but let me tell you about it!
Managing a remote product team is much like managing one located in an office. The focus of your time should be focused on coaching on five key skills that will enhance their communication and collaboration. Coaching in these areas will make your product team not only better at remote work but better all around in their product work.