The responses so far in the thread have been great. In addition to them, here are some general tips on ranger aggro:
If you dont want aggro
- Use your jolt spells (they decrease your aggro significantly and are fast/cheap to cast) on engage and then if you need to
- Watch out for weapon procs (especially debuffs and stuns) and jolt accordingly
- You get a weapon proc spell (jolting blades), use this if necessary
- Have the tank call assist when he thinks he has enough aggro, if necessary
- Use your bow if you get too much aggro still with melee
- Dont do / limit the things you do that are listed below
If you want aggro
- Cast tangling weeds + flame lick/immolate and refresh whenever they fade
- Cast a weapon proc on yourself (Call of the Mound is the best, its huge aggro), most of them have stun components
- If you're bowing/kiting, use Quiver of the Sun (it has a -150 atk debuff + blind that is good aggro)
- Be really low on health :roll:
Hope this helps

Good luck!