contemplate - To spend time considering a possible future action, or to consider one particular thing for a long time in a serious and quiet way.
Now that Angela had graduated from college, she had to contemplate whether to get a job or get a more advanced degree.
sober - Serious and thoughtful in mood or behavior, not playful or exaggerated; or not under the influence of alcohol or drugs; clear-minded.
It was a year since he gave up drinking and had decided to remain sober all the time, and it took strength to just walk past the bar.