Pros:
+Your Q allows you to dodge certain skills if used correctly
+Resets on kills
+Hyper Carry
+Great Split Pusher
+E gives True Damage, to help kill tanks
+Easy to learn
+Fast Clear, Good sustain with Meditate
+Strong 1 v 1 if you're at least even.
+Swordboots.
+Can't be slowed if your ult is up.

Cons:
-Extremely Fragile.
-No form of CC
-Weak against hard CC
-Heavily Item Reliant
-You need to get a lead otherwise you're a glorified cannon minion
-Assassins and AP Burst WILL oneshot you
-Requires decent knowledge to dodge skills with Q

So. Depending on your skill level, you have 3 ways of going about this.

1. Hard Farm
2. Gank
3. Counter Jungle

If your lanes are pushing, the enemy team is hard to gank, your 2v2 or 3v3 is weak, Hard farm. Just try to get your items as fast as you can so you can carry.

If your lanes AREN'T pushing, the enemy team overextends 24/7, your team is extremely responsive. Gank, Gank like your life depended on it. It's fine if you don't get a kill, at least force them to use a Summoner's Spell. Your best choices to gank are Top and Bot. Best time to gank is when you have Red buff, at 6, or at least blood razor.

If the enemy team invades, do your opposite buff and then go steal theirs. You never want to go into a fight early without one of your buffs.

Jungle pathing:

Path 1(no invade)-
Blue, Wolves, Red, Scuttle, Gank

Path 2(invade)-
Red, Their Blue, Their wolves, Scuttle, Gank

Path 3(hard farm)-
Blue, Gromp, Wolves, Red, Raptors, Scuttle (if it's not gone yet), Krugs

So this will depend on your ELO/Rank

Bronze :
Zed
Jax
Rammus
Amumu

Silver:
Jax
Fiddle
Leona
Shaco

Gold:
Jax
Lulu
Morgana
Elise

Use your Q right before you get hit by a skillshot in order to dodge it.

Meditate to reset your Auto right after double strike

Need to reset Q while tower diving and there's no minions and they're too far away to auto? Hit the tower to reset it.

Don't Q into the fight unless they're hard CC'D that is your only gap closer besides your flash.

Your Q will leave you where you were if the target you Q'd on dies mid cast. Use that to your advantage to poke without leaving yourself in a bad position.

You can use your Q to dodge autos from jungle camps, it'll save you a lot more health if you learn how to use it correctly.

Your q can also dodge the knockback from dragon, saving you more time on a dragon clear as well as saving some HP.