This is really a listening game. You need to listen carefully at other music. The list in my other post is a good list. Examine those tracks, and you will probably discover something.
That 1/3 beat is probbly triplets.
Leads are usally very fast, like 16th notes, or in your case 16thT notes. Psy will use just about anything for a lead. Where eruphic trance uses sawtooth waves, psy may use a guitar, harpsicord, music box, or other sample instruments.
You could take a sawtooth wave and put it through a phase filter, and compose a 4 bar melody, maybe try making certain notes very quick.
It is realy hard to discribe this, you should realy listen to the above tracks, you'll understand soon enough.