Opportunity Costs

This is interesting to me. How applicable my college classes are to my (what I consider) 'real' life. "Those who have ears to hear let them hear." In economics right now I am learning about a basic economic principle called opportunity costs. Basically this principle deals with your choices in life. Every choice you make has an opportunity cost, something that you give up to make the decision that you do. By accepting a 45k a year job in Denver, I choose to stay here, in Saint Joseph for 42k a year. I have an opportunity cost of 3k. Opportunity costs include intangible items, such as happiness by being near family, commute time, local football teams to root for, etc.
In life, the decisions I make have opportunity costs. For example, sleeping in an extra hour gives me rest and might help me start my day. However, I am giving up the opportunity to maybe read my Bible, pray, workout, read anything, do homework, talk to my girlfriend on the phone, talk to my roomate, maybe a chance to hold a job online and make $100 for that hour. As you can see, everything has an opportunity cost. Every decision I make takes the place of a decision that I COULD have made. Those costs can and do add up throughout my day. So my question to myself and anybody is what are your opportunity costs? Are you making the best decisions that you can? Daily? Minute by minute?