Chassidim have been "meditating" for the past 230 years.[1] Before that meditation was limited to those well versed in Kabbalah. Chabad Chassidus alone has literally thousands of pages on how to meditate and what to meditate on[2].
Outside of Chabad and Breslov Chassidus and Sephardi Mekubalim, meditation isn't popular because to be successful you need to spend almost 2 hours minimum of prayer which the average Torah observant Jew does not feel they have adequate time to achieve.[3][4]
Sources:
[1]Likkutei Amarim by the Alter Rebbe of Lubavitch. Published 1797 (215 years ago, prior to that it was given out in pamphlets)
[2] http://www.kehot.com Seforim information. Lubavitcher Rebbe alone has over 62 volumes of published works
[3] Kuntres HaTefillah by the Rebbe Rashab of Lubavitch discusses prayer and preparation (medidation) prior
[4] In the last chapter of Likkutei Amarim the Alter Rebbe of Lubavitch says that a person should spend 1.5 hours involved with Shachris (the actual prayer and the preparation)