She did many things right and a few wrong.

Wrong:
She went out into wilderness alone.
She did not tell anyone where she was going or when she would return.
No mention of use of maps or GPS to confirm her direction of travel.

Right:
She carried extra clothing and supplies.
She was aware of hypothermia and took measures not to let it interfere with her self-rescue.
She kept a positive mental attitude and perserved in the face of difficulty.
She was familliar with the area so did not have to rely on maps.
She improvised to tools to overcome her disabilities (wiper use while driving)