I'm surprised no one mentioned smoking. Despite the fact that it is deadly for you and the people around you, 20% of adults still stupidly continue to do it. I also believe that there is a correlation between tobacco use and education/lack of, in which it is pretty obvious to anybody who can read the warning labels that the stuff will kill you. Also, in addition to being lethal, it is expensive. It will be interesting to see which addiction is stronger: smoking or driving.
Lung Association
Secondly, insurance. This has already happened at my house. I took collision off of all of my cars and thus lowered my insurance payments to liability only, with big deductibles. This has cut my insurance bill by probably 40%. Auto insurance is a scam anyway, because they do everything in their power to not pay the accident victims, and also, because the insurance lobby is strong enough to get laws passed to make their products mandatory for all drivers.
I would expect the rates to start to skyrocket to make up for good drivers like me cutting back on insurance and leaving the system to the people who wreck frequently.
Life insurance is another thing. This has already happened at my house too. Not much point in paying however many hundred per month in case of the very slight possibility that you will suddenly kick the bucket, if you can use the money elsewhere. Also, your insurance is only as good as the company that writes the policy, and there is some question as to how long these guys can stay in business without a steady supply of new customers/suckers coming into the system.
Thirdly, kid pampering: Examples: expensive birthday parties, trips to Rat World, driving them around for activities, excessive spending on toys, etc. Certain people will cut out their kids Karate lesson so that they will be able to keep driving the SUV and/or not have to quit smoking.
Fourthly, magazines and newspapers. I think we still get Cosmo and Glamour at our house, but I can see cutting back on hard copies of daily newspapers and nonessential magazines. You can get most of the content for free on the web, plus not have to deal with the resultant solid waste. Bad news for the already weak newspaper business.
I would be interested to hear any ideas about cutting back on cosmetics (mainly used to make females more attractive). This stuff is really expensive, and for many females, is marginally useful. A substantial part of the sales of many retail places such as Walgreens is the cosmetics section, which takes up half the store. Also, the phenomenon of having your "nails done" is pretty popular in my area, where you can find a nail place in every strip shop. I am thinking the usefulness of having beautiful nails, if it ever existed, will go out the door when more of these hands are engaged in useful work.
Also, I would be interested to hear any ideas about cutting down on golf. In addition to the expense of course maintenance, etc, this is the male equivalent of cosmetics, and a major budget item for some people. Where I am it costs on the order of $85 per round on some of the local highbrow courses, plus you can spend an unlimited amount of money on this activity (equipment, clothes, lessons, etc.). So, pretty easy to spend $1K per year if you golf fairly frequently.