PREPARING MY BODY

Husband is overseas till next year, so wanting to get healthy and prepare my body. I am very irregular like 2 to 3 periods in a year. But recently did have a regular 3months then ended up skipping 2months and now I'm on CD2.. So what should I do to keep them regular. BTW we've been trying for baby #1, I did become pregnant once but ended at 11 weeks in 2008 and kept trying ever since and nothing.. I've gone to the doctor and everything is fine I've even gone to two other doctors but they've said the same.. so anything I should be doing now to help prepare my chances til hubby gets back.. TIA