DragToDo is a light-weight, low mental overhead to-do-list app for macOS to just keep track of the Most Important Things (MITs). Drag-and-drop files, e-mails, calendar events, etc., to make a list of what you need to be doing right now. It can also be used as a list of temporary bookmarks you want to keep together while you're processing them.
Simple drag-and-drop interaction makes it easy and fast to add new items to your list. No clicking, no typing, no deciding what project a new item belongs to or which priority it should get. Avoid the mental overhead of coming up with yet another "five-word item description".