When life gets hard, something I find to be helpful is writing my thoughts down. It sounds so simple to do, but it can be so cathartic.
More and more I find writing to be like a meditation, a chance to deeply tune into one aspect of my life. Sometimes my head can be quite full, and writing is a good way for me to order my thoughts and sift through them. If the same thing keeps bobbing to the surface even amongst the calm, if something is niggling away at me then I know it is time to address it.