"... Take to heart all these words I am giving as a warning to you today, so that you may command your children to carefully follow all the words of this law. For they are not meaningless words to you but they are your life..." (Deuteronomy 32:46-47 HCSB)
"They soon forgot his works; they waited not for his counsel:" (Psalms 106:13 AKVJ)
"And he gave them their request; but sent leanness into their soul." (Psalms 106:15 AKVJ)
Don't be hasty. Wait on God. God may give us what we want so that we may realize that our real need is Him, not our selfish desires.