Eating more meat affects our planet negatively because of the number of resources that go into producing meat. Off the top of my head, I know that it takes almost 2,000 gallons of water and 2 pounds of grain to produce 1 pound of beef. Livestock also creates methane and depending on the fertilizers used they also produce nitrous oxide emissions. 

Using too much water dries up rivers. The Carmel River is experiencing a 45% decreased water supply, and some rivers (the Colorado for example) never actually make it to the ocean. It is, however, a fallacy to believe that showering less puts a dent in one's water consumption. Eating one less steak makes up for dozens of showers.

Whenever I want to buy an item, I double check whether I actually need it and most often sleep on it. Most time, I don't need it. I try to get many things used and will try to pass them on if I don't need them anymore instead of throwing them away.

Yes, because naturally, those who consume in excess will need to reduce their consumption greatly before anyone less privieged can be expected to do so as well.

This is exactly why I think it is important to appreciate one's natural environment with all senses. It can be a spiritual experience. Also, only true appreciation of the natural environment makes one want to commit to preserving it

I love cycling and connecting to my surroundings by taking them in with all my senses while I ride through them.