The recent exchanges in your relationships have given you cause for optimism. Starting today, it’s time to iron out the fineprint of the dreams you concoct with others. Especially if shared resources are involved. Before you open the joint account, launch the collective community garden, or revamp how your bills are split at home: dig into the details. Articulate your ideas and what you need to make them happen. Like a stone dropping into still water, what you communicate right now has heft — and impact.