This type of meditation is about noticing. Just noticing. Not controlling or fixing or changing or judging. Just noticing. You can practice with watching clouds, watching the rise and fall of your belly with breathing, watching animals or children play...the options are limitless. Simply observe. If you notice a thought, don't cling to that thought or push that thought away. Simply notice it and go back to noticing your surroundings.
This meditation is great for practicing non attachment and acceptance. It's good for getting us outside of ourselves, our egos, and our thoughts. Its also good for relaxation.
I suggest starting this practice daily. Start with doing a discrete 2-5 minute practice and go from there.