Press "Cmd/Ctrl + K" to quickly toggle the “Jump to” bar. Just start typing the name of the channel you want to jump to and then hit enter on the one you'd like to navigate to!
Press "Cmd/Ctrl + /" to toggle the search bar and easily search for items in your workspace!
Press "Enter" for a line break within the same text box for summaries and descriptions. Also, "Shift + Enter" will submit information entered when initiated within the summary and description text boxes.
When it comes to comments, pressing "Enter" within an agenda item will submit the comment and "Shift+Enter" will start a new line.