The pendulum of Nick's wall clock is never swinging though time passes and you can hear the sound of the ticking clock.
In the wide shot of Will standing when Ashley runs off after their first run-in Ashley's phone is nowhere lying on the ground, however in the medium shot before and when it rings alerting Will afterward, it is.
As Will is realizing the full effect of the 3-Alarm Chili and the camera pans back & forth, his & Ashley's bowls of chili alternate having the cheese on top & mixed in.
When Ashley takes Will to see Nick at the hospital Will is not carrying anything and only pulls the small tape recorder from his pocket, however when Will joins Ashley in the waiting room a few minutes later he's carrying his black tote bag and a notebook.
When Nick is giving Ashley tea and she is eating the muffins, we see a shot of her taking a bite of muffin, and there is a mug on the table. Then we see Nick walk over with the mug of tea and back to Ashley and the table without a mug as Nick sets it down.
The wide shots at the beginning indicate they live in Chicago, but there are several locations that are obviously in Utah, including the hospital where Nick is admitted (Timpanogas Hospital is in Provo/Orem) and the Gallivan Center, where Ashley and Will go walking (obvious sign) is in Salt Lake City.