Trying to change my children's way of thinking!

This is a huge test to my patience.  I have always been happy my kids are five years apart in age.  But in the past 6 months, I have wishing they are closer in age! It is almost like they don't have anything in common.  One is hitting the other, or tattling, or biting!!!! AHHHHHH!  So we have decided the naughty step isn't working.  So we have began standing the kids in a corner.  We will see how it works.  My kids are definatly not liking it.  They are also not liking to tv! This could be harder on the parents then the kids...I will let you know how we make out!