pleo, if u r getting nice pure k, then why would u have 1/2 point on your first go?
i really reccomend u take about 1/4 - 1/3 point if it is good.
if it is a k bikki then u can take up to half.
Its really better to start small, rather start too large and end up throwing up, or not expecting the effects so strong.
take little experiment, run around, spin, walk backwards... (try a treadmill)
and u can always take a lil more to your desire.