I've felt this way and have started celebrating inputs - the work involved in building something - rather than outputs (the sale, the deployment, etc.). Once it closes or the deployment is successful it's always onto the next thing immediately and there's no time to sit back and reflect on the hard work and enjoy the time spent with others in the process.
I must ask myself, when is suffering no other means toward suffering less?
Good read - very relevant to today's markets and trends. There are many "best practices" that just further dehumanize the corporate world.