Several months ago we began making "eco-bricks" out of our plastic waste. The idea is to take a water bottle/juice container etc. and shove it full of your plastic waste. It usually takes us 2-4 weeks to fill one "brick". We typically have plastic bags (from frozen fruit), containers from soy-milk (we cut them up into small pieces to make them fit in the bottle), stickers/labels from fruit etc. you can fit much more into a single bottle than you would imagine, using a stick to pack the trash in.
There are many things you can do with the finished bricks - people are building homes from them. We plan on creating a raised garden bed from ours once we have enough. Creating these bricks and living as close to zero-waste as possible has almost totally eliminated us sending anything to landfills now!
Here's a website with more info about eco-bricks :