A long to-do list may simply document weak boundaries.

A long list is often a record of things you agreed to rather than things that matter. Each item arrived because someone asked and saying no felt awkward, and the accumulation looks like ambition when it is mostly accumulated agreeableness. The list is describing your last hundred conversations.

Go through it and mark which items came from your own judgment and which came from someone else’s request. Then remove three of the second kind, and tell whoever needs telling.