I would strongly recommend it. I would strongly recommend that you do a dedication of intention any time you're doing the formal practice. It's very helpful to remember why we are practicing, very helpful to remember why we are living. It's very easy, especially in our normal life, to forget our true inner direction, and we become involved and pulled away, doing things that are not very important, and start to think these things are very important.
By making this dedication of intention very strong in the mind, it helps us to remember it throughout our life, and use our life as opportunities to develop the Paramis. Especially it helps us to develop more equanimity, balancing with the changing experiences in life, because we see they're all opportunities to develop the mind. So I would strongly recommend that you make a dedication of your intention before every formal practice you do.