Originally Posted by itzMorglum
Question about purchasing items...
Should I save gold and buy item when I have enough to pay full price, or should I buy chaper items, one by one that allows in the end cheaper purchase of better one?
That depends on conveniance and situation.
In early game, you'll want to tend to your lane as much as possible in order to soak up gold and exp from creep kills. Try and recall and buy what you want fast, or have teleport handy for coming right back.
Later on in a game, try to look for oppurtunites where your team has the lanes covered or your team just took out a decent number of enemy champions before recalling back and buying.
Buy as often as possible, since every item brings more stats, but make sure you don't spend too much time away and aren't putting yourself or your team at a disavdantge in the process, since, they are one man down for however long you'll be at your base and running back.