Here are the ways you can enjoy the movie.
1. Be Stoned and/or drunk
2. Be extremely tired so that you're zoning out the entire time (I chose this option)
3. Have Bad Taste in movies
4. Accept it for what it is. (I chose this as well)
It is as bad as you expect it to be, so there is no dissapointment there. Just sit back watch it and allow yourself to be dumb and immature, that's all I can really say.
Oh, I was impressed with how much the movie looked like the movies it was spoofing.