Live Long and Prosper
Eph 6:2,3 "Honor your father and mother"-- which is the first commandment with a promise-- "that it may go well with you and that you may enjoy long life on the earth."(Deut 5:16)
Here's an additional motivation for obeying your parents; namely because generally speaking those who honor their parents are better off for it. Parents characteristically have their children's best interest in mind. Which is not to say that they will necessarily act in accordance with what their children are interested in, but rather in accordance to what is best for their children. For given that "Foolishness is bound up in the heart of a child" Pr 22:15, it is necessary they be trained to do what is right and good. "Train up a child in the way he should go, And when he is old he will not depart from it." Pr 22:6 Children that are untrained may literally end up dead. They may get involved with the wrong people, get involved with crime, drugs, sexual promiscuity, or the like, and end up if not dead, end up living a miserable life with miserable eternal consequences.
The immature are generally under the foolish impression that "enjoying life" constitutes fulfilling the desires of their sinful nature. But they fail to consider the long term consequences, issues of fate, corruption to one's spirit and one's conscience, one's mind and body. And while they may experience temporal pleasure, they miss out on what life is really about, and it's not about living for pleasure. The wicked are "lovers of pleasure rather than lovers of God" 2Tim 3:4 and "the widow who lives for pleasure is dead even while she lives." 1Tim 5:6