Which is best time of the day to conceive? any recommended position?

Honestly I don't think there is a specific best time of the day to have sex that will better your chances of getting pregnant. If there has to be one, pick a time when you're the most relaxed, free from obligations and worries (if there ever is one). It could be in the morning before you start work, at night after a bath etc. But pay attention to your ovulation period as well and know which days are the most optimum in terms of fertility. Position wise, alot of people believe that missionary is the best, especially with the lady's hips elevated. But then again, it's not the same for everyone. Try different positions, conceiving a baby is serious but that doesn't mean it can't be fun :)