What has worked for me all these years is to use "contingency management" with everything.

For instance:

If you want___________________then you must FIRST do _________________!


If you do not do _________________ then you will have to do _____________!

As in, "if you do not sign up for disabled student support as you indicated you would, then you must bring your truck home from campus."


In order to get, do, have, enjoy you must first do_____________, just to reiterate.

Parents make a big mistake when they give things, privileges, or rewards without first requesting or explaining or expecting, the desired behavior. If you institute this system and stick to it, you will have very obedient children, when the chips are down. If you say it doesn't work then you are not doing it correctly.