Rolex has a good idea. Let a pro look at it.
But if you choose not to, here are a few little things.
I am going to assume you have a fixed pitch heli...
First, the head (the topmost part which the 2 main blades are bolted to) should wobble back and forth along the long axis. That's ok. Also, the blades should be slightly loose. That allows them to align themselves when the head spools up.
One thing to look for is the orientation of the flybar paddles. That's the 2 smaller blades under the main ones. They should be flat. It's easiest to align those by sighting down from the end and make sure the angle of the paddles is the same as the angle of the swashplate. The swashplate is the thing with 4 prongs coming off it that the servos hook to which in turn hook to the blades. If they are tilted down, they will create negative lift and will keep it on the ground. But don't tilt them up as it will create a lot of drag and you may not generate enough head speed to lift the bird. You may find that you will have to go past 1/2 throttle to get the bird light on it's skids. Don't worry about that. Just don't gun the throttle or it will spring up off the ground and into God knows what.
As far as the tail goes, that will take some dialing in. You can create more tail action as needed by either adjusting the tail trim on the tx or increasing the gyro gain. I'd work with the trim for now.
If you're still having trouble, there are a few good resources on the web for getting some info. I usually look at
www.runryder.com or the heli forums on RC Universe.