Low sperm count & motility

We have just found out that my husband has low sperm count and low motility. Doctor is referring us to a fertility specialist but we have to wait for a second blood test for me as my first progesterone test came back borderline (she thinks she might have scheduled it for the wrong day though so hoping second will be ok). We both have good diets, don't drink much or smoke. Just wondering if anyone has advice on anything we can do in the meantime to improve this, or if anyone has been in a similar position and knows what the next steps are likely to be?