The 'snow' on Emma's father's truck is hanging off the front side panel and blowing in the wind when he says goodbye to Jake. This reveals it to be fake foam snow.
Tim makes a phone call from his hotel room about one hour into the movie, and someone answers, on a phone without a phone cord.
When Jake tries to ring Emma from his hotel room after being "found out" you can clearly see that the phone has no cord.
Home Hardware is a major Canadian retail chain. They are not in the US. Yet their plainly labeled storefront is clearly visible on the main street of "Athens Nebraska."