I spend as little as possible on cars. MPG and maintenance costs are the only things I care about because it puts money in my pocket. Right now I'm driving a non-hybrid 37mpg car I bought under warranty 1.5 years old used for 11k, it was the cheapest car I could possibly buy when I factored in price, fuel cost, insurance cost, and potential maintenance costs. I could give a flying crap what it looks and performs like as long as it can get up to 75-80 and break safely.
For food my opinion is that fast food and sit down restaurants are the biggest things to avoid. Fast food because it has potentially massive health costs involved once you're over 30 and sit down restaurants the idea of paying $30-100 per person for one meal is really outrageous when you think about it, makes more sense as a special occasion than a regular habit. I find a few places I can get healthy reasonably priced meals as takeout from and do them when I don't have time to cook at home. Healthier and cheaper than both the top and bottom end of the restaurant spectrum.