You can take the pill in the morning or at night. Main point to remember is to take it approximately at the same time every day - otherwise the drug may not be as effective. We usually advise the woman to take the pill soon after brushing her teeth at night - so that she does not forget. You can link it to any activity, which will help you remember to take the pill.
You can take the pill before or after food - no difference. However, if you have vomiting or diarrhoea - the pill will not be effective and you need additional method of contraception on those days.