The best method IMO is holding all your BTC in an offline wallet (preferably paper) and lock it in a vault in a bank or a far place IMO, you won't be able to get to it easily and if you play with the money your earn in bitcents it won't be good but not as bad as playing all your bitcoins.
That sounds like a good idea to do if you are truly addicted. I think that once you know you are addicted and are wanting to stay away from it, that's already a huge step in realization.
You should seek out help for this addiction if you do want to stay away.