Answer:
Yes,
We need to find a planet like Earth, livable. Then we need to figure out a way to get the worlds population on that planet. Only then can we truly settle there.
There are planets that are good candidates. There called Gliese 581 c and Gliese 581 d, they orbit a red dwarf 20.3 light years away. And they are thought to have an atmosphere and a temperature in which water may exist, and may also be in the "Goldilocks Zone"
http://en.wikipedia.org/wiki/Gliese_581_…
http://en.wikipedia.org/wiki/Gliese_581_…
http://atoc.colorado.edu/~seand/headinac…
http://innumerableworlds.files.wordpress…
Although I think Gliese 581 d has a better chance to Sustain life.