K.J.
Most people I know who get too stressed about conceiving fail to until they just relax and go with the flow. Just enjoy yourselves and don't pressure one another if you are not in the mood at the optimum fertile times.
For me, I pretty much know that if I watch my calendar days I will conceive if we have sex anywhere from day 13-18 of my cycle. At the risk of giving TMI, it just so happens that our most enjoyable intimate experiences have all been very spontaneous and resulted in our 3 kids.