If I could give new gamers one tip for terrain making it would be this - always remember to check after-Christmas clearance sales for stores that sell hobby supplies and/or decorative Christmas collectible tchotchkes. The forest below cost me less than $20, was quick to assemble, and looks effective at multiple scales.
All the pine trees are "small" Lemax trees that came in packs of two. I got them at Menard's for less than $.070 each. As they are glued to large, heavy snow-covered bases, they required no effort to place. The forest bases themselves are made from beige felt (pine forests usually lack much undergrowth and are blanketed in dead pine needles, which are a beige-brown color), liberally spray-painted with black, brown, and rust red paint. I then cut irregular holes out of a piece of cotton fabric and glued the felt to it. When the glue dried, I added some static grass to the open sections.
The best part is all the trees and bases fit in a one gallon ziploc bag for easy storage.