salat is the best among all acts of worship. If it is accepted by the Almighty Allah, other acts of worship are also accepted. And, if prayers are not accepted, other acts are also not accepted.
Offering of prayers five times during day and night purifies us of sins in the same manner as bathing five times during day and night makes our body clean of all filth and dirt
It is befitting that one should offer prayers punctually. A person who considers prayers to be something ordinary and unimportant is just like one who does not offer prayers at all. The holy Prophet has said that a person who does not attach any importance to prayers and considers it to be something insignificant deserves chastisement in the hereafter.
Furthermore, one who performs prayers should be repentant and should refrain from all sins and especially those which are an impediment in the way of acceptance of one's prayers (e.g. jealousy, pride, backbiting, eating haraam things, drinking intoxicating beverages, non-payment of Khums and Zakat).