In a nutshell, you need to improve in two areas. The first, knowing what moves will throw yourself under the bus. We don't need to make it anymore obvious than it already is. Secondly, learning some cover and an act. BJA has some pretty concrete information on cover plays. Just be honest with yourself as to how much cover you can afford to apply in consideration to your bank roll and rules. Otherwise, you may be playing a losing game to begin with.