Here's what helped me (as an ex-thighbruiser myself):
I start my OLs with a frog stance (wide knees and feet turned out about 45degrees). This allows for the knees to get out of the upward path of the bar for me--I have a really long torso, and Greg E. suggested I start this way.
Next, I started doing clean or snatch pulls after my full lift work, concentrating on feeling the bar moving straight up and down during the shrug portion. Getting my pulls better has really helped reduce the looping. I do my pulls at 5-10kg heavier than my heaviest full lift for the day, usually about 3 x 3.
My mental cues are: "Straight up, jump". I figure the "land" part happens automatically, so I don't add any thinking about that.