I take it that you have set the mode of your transmitter correctly and that you have no trim set? Never use the trim options, trim should be zero in most cases. (see what modes other people use with your transmitter when flying quads)
As said, stabilize mode to begin (if in doubt set all modes to stabilise while testing, ignore such things as simple, super-simple etc while testing), start from scratch, re-install the device type X or +, quad etc, then re-test (no props).
Take it slow - remember this is an air frame, subject to hostile conditions, You've seen pilots doing pre-flight checks? They do it for a reason, check and double check
Totally agree with unmannedtechAlex et al regarding ubecs
And don't do what I saw someone do yesterday - flying a "toy" quad on a beach with an offshore breeze. It was only going to go one way! He was okay at 6feet, once he ventured to 20' good bye quad - splash!