Regarde-me ! is incorrect but look at the following lesson for more examples:
Regarde-moi! = Look at me!
Attends-moi! = Wait for me!
Aide-moi! = Help me!
Rappelle-moi! = Remind me!/ Call me back!
Me will be me in the negative commands like in the following examples :
Ne me regarde pas! = Don't look at me!
Ne m'attends pas! = Don't wait for me!
Ne m'aide pas! = Don't help me!
Ne me rappelle pas! = Don't remind me!
The following lesson will give you more examples -
Hope this helps!