There is a Move command in the Actions menu of emails, landing pages, forms, reports, which makes it easy to move these.
To move lists, smart lists, and smart campaigns, you have to clone them into the new location and delete them or drag and drop them, which can be painful when dragging from a folder at the top of the tree and dropping into a folder at the bottom.
Please add a Move command in the Actions menu of lists, smart lists and smart campaigns.