improving the 'sustainability' of my lifestyle

At home i drive everywhere, before i passed my test i would walk or use public transport. I thought how did i ever cope without a car. The public transport is really good where i live to so i have nothing preventing me from being sustainable except for being lazy. I have a railway station 10 minutes walk away and a bus station the same distance away. Since ive moved into halls though, and not got the car, i walk to places and use public transport when i need to... It just makes me think did i really need to drive to the corner shop back home, when it only takes 5 minutes to walk to it?
There is also the big issue about re-usable bags when you do your weekly shop at the superkarket. I try to keep my 5p green bags and use them again week after week even though doing this feels like a really small, insignificant action. I could take this further and buy items which do not harm the environment, with all the packaging they use and the transport involved in getting them to your local supermarket (for example only buy local produces). Im sure i would not be able to buy most my favourite items if i read all the labels and found out where they came from. Economically this can help local businesses.
Recyling is also a big issue. The only thing we have at home is one green box which only certain items can go in, because it is just one box we normally forget what we can put into it and end up putting it in the normal bin. In halls though there are 3 bins. They are labelled and mush easier to use. At home i think our council can take recyling a whole lot further by doing something similar maybe.
With all the gadgets and technology of modern life energy consumption must be quite a lot in my home. Using energy saving bulbs and making sure thing are not left on standby helps. My dad is forever leaving the TV on standby though, so he prevents me from doing this.
I think most of the improvements i would try to make would environmentally. Socially though i do not even know 5 of my neighbours out of the 7 i have back home. I just say hello to them when i see them but have never had a conversation with them, except for the 2 i know quite well. Everyone seems to busy with work and just life in general, so i would feel i am intruding on their lives if i spoke to them. This is pretty bad because knowing your neighbours would create a nice community atmosphere.