Wanting to be calm all the time is an understandable desire. It's a natural reaction to a world that offers and encourages very little of it. That being said 'calm' in the way we are often taught mindfulness, is not the solution, nor the intention of those who originally pioneered mindfulness meditation.
In order to find true calm, we need to be able to embrace and harness whatever energy is present, not ignore it or wait it out. We do that by coming into relationship with whatever is here right now unconditionally, whether we find it pleasant or not.