There is no should when it comes to a Paraliminal. Try it and see which Paraliminal you like for getting to that good space.

Happy for no Reason, - when you're doubting yourself, when it's raining, when you need a lift.
Euphoria -I suggest when you're feeling neither good or bad. When you're satisfied and don't have any goals for the day... take an ordinary day to the next level.

Alex