Lots of gems here.
Paraphrase Your Previous Content Pausing to say, “So just to step back for a moment, I’ve already covered how X and Y are relevant … ” gives you a moment to remember point Z, and even frame it as a point you’ve been building toward.
Ask Your Audience a Question — Maybe Even a Rhetorical One “What seems to be the most important point so far?” Asking a rhetorical question not only provides you with a chance to collect your thoughts, but it also boosts your confidence because you know the answer, and launching into that answer will likely get you back in the flow.
