Hi Zinon,
between sessions is a good time to get grounded. Then, there's exercise, diet, cultivating bhakti, mindfulness, self-inquiry, service to others, svadhyaya study of scripture (and possibly extended to mean any literature) or really any of the suggestions under restraints and observances yamas and niyamas, reflection, introspection, tantric practices, find or create a satsang, etc. If you want to do more and have the time, you can extend your sitting practices or even add a 3rd session as in retreat mode which in all is guaranteed to require a lot of a day's time. See what you're attracted to most, what comes naturally, and go from there.
It does seem that way, that once you get started or when the interest arises of its own, there's no looking back, and at least it has been true here. If going forward is too much, give it time so the practices can help keep the inquiry relational.
