There are typically just five to ten important factors to consider when making a decision. It is important to understand these really well, though the marginal gains of studying even the important things past a certain point are limited. — Ray D
My PE/HF/IB clients are inundated with noise and endless information on a daily basis. 2-3 things drive 90% of the value creation... big data can be a big waste-a-time.
In addition, the emotions of deals and teams introduce a variety of other stimulus that can consume your time: - needing to be right - worry over be most prepared / saying something dumb - colleagues who don't know why we are here or what we are doing!
When everyone is clear on the desired effect: more sales, clear message to client on strategic alternatives etc, efficient analysis and discussion follows. When finding yourself in the weeds, ask "what am I doing, what's the larger goal here, what are my senior colleagues looking to solve?"