The quality of your life will be a reflection of the quality of your thinking. Where your attention goes energy flows, and that's what you attract back to yourself.
Are you always stressing about things that haven't even happened yet, or wishing something that's already happened occured differently? There's nothing you can do about either of those things, so why not change your focus to imagining what you do desire?
What does an ideal day in your life look like? Do you have it written down somewhere? - 50 minutes ago