When the little rubber feet (LRF) come off the bottom of your laptop - you could use this as an excuse to buy a new laptop. On the other hand, if you are feeling a bit less acquisitive, you might try re-attaching those annoying little bits of rubber-like material. That is, you could try - if you can find the detached feet.

Tried without success to re-attach the feet with super glue, rubber cement, and hot glue. After the last attempt realized the rubbery “hot glue” material might serve as pretty good feet all by itself. After the first trial, ripped off the remaining rubber feet, and smeared on “hot glue” replacements.

So far the replacements have served better and longer than the originals. :)