I just started with a new therapist and I already miss him between sessions with the same intensity, or stronger (he's a better fit for me) than my previous therapist before things got bad there. So I'm thinking it's a combation of my therapist and the therapy experience.

What I do: I journal on my laptop right after my session. Later when I need to I edit that for more precision and add new insights. I pull up my therapist's website and reread it and look at his picture. Or I take a different route and distract myself by keeping busy or talking wlwith someone, not about therapy-type stuff or even personal stuff necessarily but someone I can (and want to) talk deeper with. Also count how many hours till the next session.