One of the best ways to speed up the use of any application, including Things, is to learn and use keyboard shortcuts. Luckily, Cultured Code has created a great PDF to outline all of Things shortcuts. These shortcuts include different ways to navigate, sort, and edit your tasks.
Although this document is great, one of my favorite shortcuts is missing, ⇧⌘F when you have a to-do selected. This gives you a nice “filing menu” where you can choose the Area of Responsibility or Project you’d like to move the to-do to.
Here’s the link to the document.