A group dedicated to its work persists through obstacles, distractions, and lulls. Remind yourselves of your larger purpose and what you really care about. As the group moves toward action, support effectiveness by getting clear on who will do what by when and how to ensure it really happens.
Quotation from W. H. Murray in The Scottish Himalaya Expedition (1951):
Until one is committed, there is hesitancy, the chance to draw back, always ineffectiveness. Concerning all acts of initiative (and creation), there is one elementary truth the ignorance of which kills countless ideas and splendid plans: that the moment one definitely commits oneself, the providence moves too. A whole stream of events issues from the decision, raising in one's favor all manner of unforeseen incidents, meetings and material assistance, which no man could have dreamt would have come his way. I learned a deep respect for one of Goethe's couplets:
Whatever you can do or dream you can, begin it.
Boldness has genius, power and magic in it!