If you need something from someone, don’t ask for it all at once. This only overwhelms a person. They will mark your message “unread” and let it sink into the abyss of their inbox until you follow up. Again.
When you need something from someone, first prioritize your list.
What do you need immediately? What can wait until later?
Ask for your immediate needs first. Keep it short and simple. Ask one question rather than three. Either lead with your question or end with it, bolded. The goal: Make it as easy as possible for someone to help you.
It’s a fine balance between not annoying someone by sending piecemeal requests, but not overwhelming them with long lists. It's a drip, not a gush.
The smarter we are about asking questions and sending requests, the less time we spend chasing down answers.