Items: Pretty much whatever. Tear of the goddess asap, start out with Doran's Ring and pots. Archangel's staff isn't bad, or you could go for a quick rod of the ages instead. Just remember, AP and mana.
Early Game Laning Technique:
QQQQQQQQQQQQQQQQQQQQ [hit level 2] WQQQQQQQQQQQQQQQQQWQQQQQQQQQQQQQQQQQQQQQQQWQQQQQQQ QQQQQQQQQQQQQQW [hit level 6] R
Mid Game Laning Technique:
remember to use "R" if you need it
Mid/Late Game Ganking Technique:
EWQQQQQQQQQQQQQQQQQQQQQQQQQQQQQWQQQQQQQQQQQQQQQQQQ QQQE [if they're not dead yet] R
And, yeah. That should do it.
Filler [what to do during all other situations]
QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQq
What to do if you're losing: