a couple things to realize about playing a good shaco, your stealth is what makes you most dangerous, always be careful of enemies carrying oracle or dropping wards. Second team ganks are useful, but once they are over be sure to know what lane is best for you. Personally due to shaco's lack of armor/magic resist I would be sure to be in the 2 person lane, as having a lane mate allows you to score easy kills. Scoring buffs is useful, but is not necessary super early unless you really need the slow. Though later grabbing that buff is great, especially because you should be able to solo it pretty easily.