Conor
"Bob's your Uncle"
30K sounds a little bit low for a tune up already? As long as you have changed the oil every 3,000 Miles and rotated the tires as well, then you should be fine until 60,000K. When you do hit 60K go ahead and change your air filter, spark plugs, oil, ECT...
FYI, doing an oil change every 3K was a marketing ploy from companies like ****** Jiffy Lube. The oil should be changed every 5K-6K depending on driving habits on newer vehicles. Do yourself a favor, and go by the manufacturers recommendations.
Also, you would be wasting your money changing the spark plugs at 60K.