One really good first step is to make an escape plan for the next time your wife gets stinking drunk.
Can you figure out a place that you and your children can get away too so that you all don't have to witness her drunkness? Maybe you don't realize it, but being a dysfunctional home with an active alcholic is going to have a horrible affect on them... and it will affect them well into the future.
Think about it. You are an adult and you don't want to face the problem of your wifes alcoholism - it's hard for you to understand... now imagine what it's doing to your kids. They have even fewer coping skills than you do!