One way I nurture a working relationship is by having an "open door" policy for my clients as we coach, which means when my client and I have finished our scheduled weekly meeting, they're also welcome to continually check in with me as desired via phone or email as new thoughts, perspectives, and potential "aha!'s" occur. Yes, my clients pay me for my time as their Life Coach in one-hour increments; but when we're done with that week's meeting and have turned our attention to other tasks in our respective lives, I want them to know their coach is still in the universe with their best interests in mind and cheering them on in absentia.
Does this take up a lot of valuable time? Not at all. I have never received a phone call in the wee hours (I'd be asleep anyway!) nor have any of my clients abused the privilege and locked up my in-box with a plethora of emails. I always appreciate hearing from them and knowing how they're doing and what's been working for them in-between our meetings. Of course, not all my clients need or want this extra support; it's not their style to continue processing after we've finished our hour, and often, one meeting a week is enough (processing and making significant changes in our lives--even those changes that we want and which excite us--can be hard and tiring work!) But for others, it's useful and meaningful. And that's fine.

A few weeks after my poem-sending client finished out her contract with me, I received another lengthy email from her updating me on her new job. She sounded very happy and wanted to share the good news with her former Life Coach, and I was happy to share in her excitement and felt like a proud parent reading her update, since a new job was a personal goal that she had met.
It's a sincere honor to be gifted with the significant life-altering details of my clients' lives, and I take their journeys just as seriously as they do.
So although keeping an open door between meetings is a personal preference--doing it or not doing it is neither right nor wrong--for me personally, the tidbits that are shared are just one more wonderful aspect of being a Professional Life Coach (and there are so many!)
A small thing, really, that's actually pretty big.