Managing Time and Costs

I've always had trouble managing my time wisely whether it be completing homework before the day ends or getting a good nine hours of sleep. Ever since learning about opportunity costs it made me think more wisely about my decisions by weighing the pros and cons of each choices that I had. Yesterday I worked till 8 and instead of wisely doing my homework I chose to watch Netflix, which i almost regretted but I knew that I had study hall and lunch at periods four and five. I had the choice of slacking off because I knew I had ample time to complete my homework, but the other hand was that I spent too much time on Netflix and it was nearly 11:30 by the time I had gone to bed. Another time when I used opportunity costs was buying a couple of movies on Amazon for real cheap, 3 for 10 dollars. This was a special deal as buying each individually would require more money,  and time to navigate each Internet page. Although I only had about 130 dollars left in my checking account, a good deal only comes around every once in a while, so I thought why not. The reason opportunity costs come to mind is that I use it almost every single day, even if I'm not paying attention to what I'm doing.