weaning from caffeine, going green(er)

I gave up coffee a month back, which wasn't such a big sacrifice when I was suffering from my third go this year with a sinus infection. The lemon juice and cayenne were doing more to cut the excess mucus than the java was. I was also working somewhere where the morale was as close to the bottom as the company's stock price at the time. Coffee and alcohol were the survival drugs of the condemned, so I had the déjà (did I get that right?) vu of my dot-com bomb days.

Now in the morning instead of coffee I have a hot lemon/honey/cayenne drink, or hot apple cider vinegar/organic maple syrup drink. Sometimes I'll have Renew-U tea. Something to clean the insides without making me jittery and tense. I'd been drinking coffee since 1988, so this is indeed news. Of course, it is summer, and I need coffee the least when there is maximum sunlight. Perhaps I can save my latte money for a light box.

I have been less tense, but some of that might be from rebalancing my portfolios, and reciting the Rosary daily. I have more energy, which I dearly need.

My house has a carbon footprint that is 0.8 of the size of my car's carbon footprint. The house has a fuel efficiency score of 9.1 out of 10, meaning 9% of the homes in the US are more fuel-efficient that ours. We do not have solar power, and live in an old house. We have updated our heating system, purchased new windows and new insulation. I'm now considering duct cleaning and sealing, and other weatherstripping.

I am saving for a new car, as my car is twelve years old and has over 140K miles on it, and have identified the following possibilities, although by the time I have enough for a full car purchase other good options will be on the market:

Toyota Prius
2008 Nissan Altima Hybrid
2007 Toyota Camry Hybrid
2007 Hyundai Elantra

I looked at family sedans at Fuel Economy, a U.S. government website from the Department of Energy.
Any of these vehicles will have fewer emissions than my current vehicle, and better mileage. I'm looking to upgrade to a family sedan as the child grows. If I purchased an Altima Hybrid this year, I would be qualified to take a tax credit.