You can start by posting a weekly (activity) report like the Wikidata team does.

Gergo Tisza schreef op 23-2-2014 10:25:
Hi all,

the Multimedia team had some discussions recently about how to make our work more transparent and more open to volunteers, and we decided to try using an open subscription mailing list for team discussions, instead of the current practice of cc-ing each member manually. These discussions are about day-to-day details of our work; sometimes feature requirements or design, sometimes technical details. The volume is typically one or two new threads per day.

We weren't sure how much members of this list would be interested in such conversations and didn't want to flood this list with mails that are not useful for most members, but we also do not want to split conversation channels unnecessarily. Please help us by telling whether you would be interested in the topics mentioned above, or would prefer if we created a new mailing list for them.

Thanks!
Gergő


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