There are three things in life that leave and never return: words, time, and opportunities. How we go about dealing with these aspects of life is what influences the outcomes of the obstacles we face. In other words, our mindsets and outlooks on the situations we are faced with practically makes or breaks the results of the situation.
The way I see it, there are two options to consider when going into a new environment in life. Option one: expecting the worst and being negative about everything. Option two: being reasonably optimistic and open-minded. Clearly, option two appears to be the better of the two; however, you would be surprised how many people would consider themselves an option two type of person when in reality, they are an option one person.
Typically, we humans like to think the best of ourselves and portray a positive outlook on life for the most part. There is not necessarily anything wrong with this, unless we are not genuinely optimistic about the happenings of our lives. The issue with this is that we put on a mask that depicts security and contentment while hiding the negative and toxic reality of our perspectives.
Generally, people who go into a new activity or environment with a negative attitude are the ones that complain about it when it is over. Think about it; if you go into a new relationship or friendship expecting the worst, then you will be actively looking for the flaws and setbacks to confirm your suspicions. Going into a basketball game with the mindset that you are going to lose is definitely not going to help you win. Likewise, convincing yourself that you are going to do horribly on an exam will certainly not contribute to a better grade.
Disclaimer: There is a significant difference in being humble and being doubtful; being honest about one's ability is completely different than being insecure and negative.
Instead of being bitter and hateful about what goes wrong, be appreciative and focus on what is going right. I have noticed time and time again that the more positive, or even just open-minded, I am when I approach new things, I find less to complain about. Of course things still go wrong in my life, but when they do I am not bitter and consumed by it. When situations fall through, I do my best to find the positive side and embrace the difficulties. It is impossible to change and to grow into a better person without failing and stumbling. The difference between a good day and a bad day is your attitude, so stay positive and embrace life!