Use long-life, compact flourescent bulbs in exit signs. Replace reflectors in the flourescent bulb fixtures which can give you the same amount of light with fewer bulbs. They are available in commercial lighting stores. Use cloth towel machines or air dryers in bathrooms rather than disposable paper towels. If you are using paper towels, buy recycled-content ones.
Toilet tissue is also available with recycled-content paper.
Recycle stained or torn linens into cleaning rags. Look for disposable items that appear in large quantities in your trash. If possible, replace them with reusables or recyclable materials.