Something that is talked about a lot but rarely accompanied by practical advice on how to is the very crucial point of remembering:
The story you are co-creating as a DM is the story of the characters.
Want to lore dump? Tie it to one or more of your characters backgrounds. Maybe they are from the bloodline of that ancient king you want them to know about.
Not sure how to fill in the details like what does the place smell like? Ask a player “You smell something odd, describe the smell”
I am currently in the process of making some guide like posts and videos on certain topics aimed at both players and videos. Some are meant to be shared with players that are new, like the basics of tactical combat to help reduce your workload, especially with new players.