im a carry player and here are a couple of advises on "hot to play a carry"
first of all u MUST know ur oponents so dont go for a coke while game is loading b4 game start and try to learn who has what summoner spell (specialy who has heal, ignite, exaust) , now what summoner spells shud a carry use, here is my "go smash their faces" summoner spell list
cleanse - using cleanse in my expirence is way WAY WAY important if u playing a glass canon since stun/snare = free base portal for u, a carry is not only ofencive spells, u cant pew pew ppl if ur dead :S
exaust - if u doing good players will just click their turret to dead trying to scape from u, and facing other carries is way easier if they cant hit u (and u still can since u used ur loved cleanse :> )
flash - if u considere u can use flash instead cleanse since it wont only help u to chase or escape, it can also help u to avoid getting hit by those CC missiles avoiding damage and stun/snare etc, plus when turret diving it will avoid turret from hiting u once u have smashed that turret lover
ignite - this is just for that ppl who really hate defencive spells, i dont really recomend it since i rather leave the pew pew to my equipment rather than my summoner spells but some ppl just love it
HEY THAT LIZZARD IS MINE!!!
A carry shud always get the neutral buff for a simple reason, with lizzard buff u wont need forzen mallet to secure the kill, as long as u have exaust and lizzard buff ur target will rarely run away in addition to movement reduction u have an always useful life degen effect on every hit , and golem buff is for those carries who rely on spells (CD reduction and godlike mana regain ftw!)
in team fights its normal to be the first target if ur the carry, so u gotta be sure to never jump in first, try to always gank or fight with a good tank or disabler at ur side, nothing is better than a tank willed to take the heat while u take down everyone, if u have the chance to gank a lonely targer do it and go back asap but soloing is not the way to go in this game
what shud i buy?
carries normally go for full dps or full ap builds which is not bad as long as their oponent team is newbe, in real fights 25% extra atk speed or a little bit extra magic penetration wont do the trick , im not saying those are crep items but u gotta learn what to buy in every game, and its quite simple, if there are a lot of CC just get mercury and even vanshees if its really insane CC and everythiing else on pew pew stuff and u will be able to survive enought to smash everysingle enemy in the battle field, if other team decided to spam dps then just do the same and be sure ur CC mates are there rdy to stun and snare any glass canon that apears in the screen
so basicaly playing carry isnt as easy as others think it is, u need to know ur self and ur enemy to make the right decitions, a bad decition (ive seen carries going for the tank b4 getting the caster only cuz the tank is the one in front :E), take advantage of everything u can (buffs, range, skillz etc) even the smallest advantage may bring u the victory in a fight.