"It's Friday!"
"It's the weekend!"
"It's payday!"
If you are saying these things over and over again you may be living life wrong.
Fridays, weekends, and paydays should be a time for different things that make you happy. If you are focusing on what is coming up, you are not focusing on the present and it's harder to make *today* good.
I love Fridays and weekends and pay-days as much as anyone. They mean that I can do different things than on the normal work-week. I might have time to laze away or do projects or spend time with my friends and family.
Having days that allow me freedom do not make the other days, the work-week days worse. If your work-week days are that bad you can make each one better by looking for something that will bring you more happiness. Go ahead, start making tomorrow better . . today.
By focusing on the benefits of some other day in the future to the detriment of today, you are reinforcing your unhappiness or frustration. You are making today a worse day.
Go ahead and enjoy your Fridays and your weekends and your pay-days but take a second and enjoy your Mondays, Tuesdays, Wednesdays, and Thursdays too. These days make up a good chunk of your life.
Here is a fun practice activity; wish someone a "Happy Wednesday" (or similar greeting). Enjoy the look of befuddlement and then happiness. You may have just made today a good day for someone.