What will help me conceive a baby?

Conceptually Fertile. Simple: get healthy (no smoking or excess alcohol); track ovulation and timing of sex (bbt, opk); see pcp for health update, check sperm count. Complex: see fertility expert for testing (get diagnosis important), if 35 yo or more then consult after 6 months; choose most cost-effective treatment. Fertility expert: rei or ob-gyn trained or large % of practice is infertility.
It depends. Depending on your age, how long you've been trying and whether or not you have suspicions of problems in certain areas (sperm, egg, tubes, uterus), your best strategy may be to patiently keep trying or to explore some medical assistance. More information is needed to guide you specifically.