I have a hard time staying with my breath because it registers all of my stress, and then that awareness causes secondary anxiety about the effects of stress. It's not relaxing to tune in to my constricted breathing. I've found it easier to focus on my feet and/or focus on a mantra.
On Jun 19, 2014 JH wrote on Stay With The Breath, by Thanissaro Bhikkhu:
Yes, true. And it's better for me to find an indirect way to slow and be mindful, like mantra, etc. Savoring the smell of a flower or nice lotion is grounding too without directly being about breath.