We use so much paper. Too much. Here are a few ideas to help a few trees:
1) Use recycled paper for all matters of printing/copying
2) Mandate double-sided printing (several employees refuse to duplex and yet print a SSID every time they look at one)
3) Set up an internal toner-recycling (would save money?)
I am sure others have ideas too; feel free to leave them in the comments!