In short: The Pareto principle says that with 20% activity 80% success is accomplished. It is more or less to find out what these 20% activities are. Applying this principle saves time and energy.
I just wondered if it makes sense to apply this principle to yoga and I came to the conclusion that at least when time is short it can make sense to focus on a few exercises that need special attention.
In my case it's trying to stand on my hands, legs bent. It's not necessary to do a warm up, because this is the warm up. Not so much space is required either.
It's Sunday the yoga week begins........