What are the best deeds to God after the obligatory prayers?

The Night Prayer (Qiyam al-Layl) is the most virtuous prayer after the obligatory prayers, and fasting in Muharram is the most virtuous fasting after Ramadan. The most beloved deeds to Allah are: prayer performed on time, then honoring one's parents, then striving in the way of Allah (jihad). The differing narrations regarding the virtues of deeds are to be understood as specific answers given to a specific questioner, or as being specific to certain circumstances.