A really comprehensive great list of blender plugins and stuff.

Cgboost  He has a list of good Blender youtube channels to follow. Youtube video

Project tutorials -  these are the tuts that yield an asset when you're done - from asteroids to medieval towns.

Beginner

 How to Create a Low Poly Tree in 1 Minute -- Uses some of the ideas in the above link.  Watch the above link first Then make a tree using this method. 

Textures list

Free 3D Texture Sites

https://github.com/  Place to get plugins for blender.

Create your own objects or Buy or get objects

Steps to Creating a 3D Environment

1. Figure Out a Concept – Inspiration is everywhere, just look around.
2. Gather References – Go to a park, go online, watc