It depends on the context, I guess. I can think of two scenarios where I've encountered this: First, I'm in a scenario where I'm bombarded with new information

It depends on the context, I guess. I can think of two scenarios where I've encountered this: First, I'm in a scenario where I'm bombarded with new information and asked to provide analysis, or I'm presented with a new problem and asked for a solution. When people ask questions about complex topics, they probably don't expect full, well organized answers immediately. Likely, they expect a conversation. Work the problem with them, just like you would alone, asking questions as necessary. Supplement your working memory by writing things down as you discuss them. People are happy to sit in silence for a minute while you work a problem or make notes, so don't be afraid of silence. This is simply how complex work is done. Second, sometimes you're asked a question where you have all the information to answer it, but you need a minute to gather your thoughts before answering. In such a case, one can be tempted to say "I'll get back to you". A better approach, if you're certain that you can answer the question with a little more time, is to simply talk through your analysis. Your boss asks "What would happen if we did X instead of Y". You need a minute, but he's sitting there, waiting! That's fine, just talk it out! Say, "Hmm. I hadn't considered that. My first thought is Z, but there are a few things to consider. First...". Make notes as you go, if you're still talking about thing A and thing B pops into your head, make a quick note to remind yourself to return to it. A great way to improve on this is to watch other people in meetings. Everyone gets put on the spot. You can learn a lot from seeing how other people handle it.