Write a Metaquine

CJam, 6 bytes

"_p"_p

Prints

"_p"
_p

which is the shortest proper quine in CJam.

Test it here.

Explanation

Both programs work exactly the same, since the linefeed inside the proper quine is a no-op and only included because it's more expensive to remove it from the output. How the programs work:

"_p"  e# Push this string.
_     e# Duplicate it.
p     e# Print a string representation of the top of the stack (i.e. the string with
      e# quotes) followed by a linefeed.
      e# The other copy is then printed automatically at the end of the program, without
      e# stringifying it.

Side Note

The same works in GolfScript as

".p".p

which prints

".p"
.p

with a trailing linefeed, which in turn is one of the shortest known quines.

Pyth, 12 11 10 9 bytes

Knocked off one more byte thanks to @Pietu1998.

jN B".[9N

This prints

.[9N".[9N

which is a quine in Pyth. You can try it out here.

Fission, 6 bytes

!+OR"'

Prints

'!+OR"

Which is the shortest Fission quine. This works because cyclic shifts of the program leave its output completely unaffected.

Try it online!