Be careful doing this everyday... Working out everyday can be very harmful to ur muscles. Ur muscles need rest for they can grow and get stronger. So dont forget to rest! And push ups are pretty easy... A can do 50 or more in a row. But if you do 100 everyday, you'll tend to do less everyday. Now, if you rest, you'll tend to do more everyday!
3 times a week it's more than enough!
good luck