The following quotes on being positive can help you to keep focused on thinking positively.
Sometimes you might find that you wake up in a good mood, but as the day progresses and you come across difficulties you tend to default to thinking negatively.
Positive quotes are a good way to keep on track. A very good thing that you can do is get yourself a book of motivational quotes, and open it randomly every day to get an uplifting quote for the day.