I believe Lent is not only for temporary "deprivation", but to be meaningful it should make real ongoing changes in our lives. One year, I gave up hard liquor for Lent, and now, several years later, I rarely drink it at all.
This year, it's red meat, of which I am far too fond, and I think that will be the same kind of permanent alteration in my habits.
I bet literally hundreds of thousands have given up smoking that way.