Get training gear and walk through [link=http://www.dream-models.com/eco/flying-index.html]Radd's exercises[/link] in different orientations.

One tip. When I was struggling (I struggle less now) with nose in, I would find that I could hover an entire pack if I only did nose in. But the moment I tried a different orientation, even tail in, I would lose it.
Now my warm up exercise is to hover tail in until I am comfortable and stable. Then side in for a bit. then tail in. then other side in. then nose in. then side in. Switching it up.

Practice, practice, practice. Let us know how you do.
Vince