Warwick
Role: Jungle
Spells: Flash/Smite <--> Smite/Flash
Masteries:
21/1/8
Runes:
/ Greater Mark of Insight(+95 m.pen) x9
/ Greater Seal of Resilience (+1.41 armor) x9
/ Greater Glyph of Warding (+1.34 m.res) x9
/ Greater Quintessence of Swiftness (+1.5% movement spd.) x3
Items: start with a cloth armor then buy boots and transform cloth armor into madred's razor then buy Sorcerer's Shoes after these items collect some gold and make Madred's Bloodrazor & Wit's End after these items Frozen Mallet and then buy some tanky items , i suggest you Sunfire Cape , Guardian Angel or maybe some magic resist (depends on enemies champions).
Skill Order:unlock your Q on 1 level , W on 2 level and E on 3 level , then make sure that you level up your Q then W and last E , don't forget to level up your ulti it will be really helpful.
General Tips: As you know warwick needs a lot of mana and some speed , he is a slow gangker at low levels till his ulti , in order to make gangs the enemies should push your lanes so you and ur mates will trap them , when you reach 6 lvl and u have unlocked ultimate it will be easy for you to collect kills but carefully dont go like a pig into gangs , make sure that you are safe and you can kick his a ss , continue like this and don't forget to farm a lot , at late game you will be a strong wolf and you will be a little tanky so you can make some damage and tank a little.
ps.: Don't use your Q when you have full hp since you won't drain a shit and it will be on cd when you need it.
ps2.: Use your ulti on carries since warwick is a good anti-carry in teamfights aswell.
ps3*.: When you are about to gang someone who has low hp don't go with your E open go on spy mode and kill him otherwise he will kill you instead or get into a safe place. ;)