Tired of the winter blues? Try some winter greens instead!
For the best terrarium advice, I'd recamend reading Martha Stewart's online how-to:
"We used kitchen canisters, which are readily available and inexpensive; their tight-fitting lids capture the condensation the plants require to thrive. For the terrarium, cover the bottom of a jar with horticultural charcoal (doitbest.com), and then put in a layer of potting soil no more than an inch thick. Add plants if you'd like, and then cover the soil with sheet, cushion, or clump moss (have a florist order it for you). Make sure that any leaves, petals, and stems do not touch the glass. Spritz twice with water, and place the lid on the jar." - Martha Stewart
Quote courtesy of Martha Stewart: Woodland Terrarium Article
Images courtesy of Green Wedding Shoes