if you really cant be arsed with weight removal etc just for the strip then all thats left is tyre pressures (fronts down a bit rears up a bit as said previously) trial and error required though- different days and different surfaces and all that, but its as simple as a hard rear tyre will squat less, wasting less of your hartd-earned effort, and the softer fronts will sort of creep a little before letting go and wheelspinning, plus generating some all important heat more quickly. for goodness sakes dont go crazy with the diffences though as you need to brake effectivly at the end and presumeably youll be using normal roaad tyres so DEFINITELY stay within the pressures stated on the sidewall and to be honest if you let more than 5psi out of the fronts or put more than 5 in the back without it helping then pressures werent the problem to start with

only other thing you can do is get them properly hot, so go bananas with your burnout, a bit of a scuff up does nothing at all andyoull just spin off the line.
other than that try to guage your fuel stop so youve got barely enough to do your runs and get to the station again, no point dragging 40kilos of juice up the strip, take your tools/pushchair/laptop/whatever assorted crap lives in your car out before you go, have a good poo etc, it all helps!
finally practice! my times vary over the course of a morning by over a second due to operator error, bad starts, missed gears etc so just keep going and if a particular tip/technique doesnt work a few times then try something else. but most of all, just enjoy it

as for skill? yes, theres way more skill in 'proper' track driving, but its more expensive and you dont get a bit of paper saying one car is faster than another, plus on a tight track decent launches could be crucial- drag races arent the only ones won and lost on the start line.....
(post modified due to poor spelling :embarassed: )