Thanks!

Yes, it's done in waking state. Just find a quiet place and visualize something of your choice. It can be a simple object or an entire environment with lots of details. The goal is to keep the focus on the object of visualization for as long as possible. Ideally with time, imagining items becomes easier and one can hold the images for longer. I find it very useful for both stabilization as well as dream control and can also come in handy when wilding.