hi there,

I learned to spot using the 'ginger bread man hugging a tree' technique
You take a step to the side open arms to the side (so you look like the ginger bread man)head looking to the wall or yourself in the mirror (yes, finding a spot on a wall/ a nail a picture/ helps but in real situation on stage you don't have that, so a general area on the wall will do)
then you take the next step in the same direction, turning to face the back, arms close as if to hug a tree and flip your head around - I'm sure you know the drill of the flipping the head around having done ballet and jazz.
The key for me to get it (and I learned it late in life...) was to start very slowly and build up the speed.

However, if you're not looking to cover too much space and only looking to do 3 -4 turns then you might find that fixing you gaze downwards on an arm - assuming your arm is not moving - might help. You won't be spotting, your head will stay still, gaze down but chin up, don't drop your head down.

If you look at some classic Egyptian dancers spin on the spot, you'll see that they are not spotting at all. (unless it's a barrel turn). See Suhir Zaki.
To travel, covering space while spinning will require spotting, but if its only a few spins you can get away without spinning.

Mind you spotting doesn't stop you getting dizzy, it just helps being less dizzy.

I also found that the more I practiced spinning on the spot (i.e not covering space) without spotting I could spin for longer and not fall over.
I also find one side easier than the other.

An immedaite way to overcome dizziness (for me) is to shimmi. So if you can choreograph a shimmi straight after your spinning 'your laughing'

Hope this helps
Galitx