Set vs. set

So, the other night I played for about 4 hours and made a set 4 times on the flop. All 4 times they ended up getting beaten by a higher set. This got me thinking. Is there ever a point where you should stop betting a set when there are no straight or flush draws on the board? On most of these hands I just kept raising because I figured they had two pair or an overpair or something. What do you think?