About a year or two ago, I decided I would simply not use disposable cups, plates, or silverware. (So-called silverware, plastic forks et al) unless they could be washed and reused. When I go to meetings and conferences, I bring a mug, my own silverware, et al. Much of what I eat can just be consumed without utensils. If I forget to bring a mug, I just don't drink anything. I am able to stick to this personal practice pretty easily. I see it as more than just a eco-habit and entering into a spiritual practice.
Image from oceanswavesbeaches.surfrider