My understanding, from listening to behavior specialists, is that many of the addictive and destructive behaviors are actually only symptoms of the real problems.
That being the case, getting to an effective and lasting solution is likely to be an emotionally intensive and time-consuming commitment.
Being afflicted with just one habitual excessive craving has to be draining, being afflicted with more than one must be pure hell, especially if there is the financial drain that comes with the addiction to drugs and/or gambling.
Whenever I see/read/hear of the trials of these individuals, it inspires me to re-count my blessings.