Baptism, The Lord's Supper, and ?

Infant baptism or adult baptism? This topic (along with are there 2 Sacraments or 7?) seems to be widely divided among denominations. I believe there are 2 Sacraments Jesus clearly provides us in the Bible (Baptism and the Lord's Supper)and also believe that a person should be baptized when they are old enough to make their own decision on what they are doing. What are your thoughts? For those who believe there are 7 sacraments can you provide where in the Bible Jesus commands us to do the other 5?