Welcome to my guide to a good Riven.
This guide is simple and doesn't have too much information. This is what the guide will cover:

Laning
- Item Sequence
- Skills
- Farming

Jungling
- Skills
- Jungling Route

Summary
- Ranked Play
- Pros / Cons of Laning and Jungling

I start off withand twobecause you want to get to your lane faster, but also so you can chase down and or escape battles early game.
Next off we getto reduce our cooldowns - this is mainly for Riven's ultimate, as it becomes very low cooldown at level 3. The rest are mostly items to set an off-tank Riven that can still deal lots of damage, while at the same time survive very well.

We start of with Broken Wings, because that deals the most damage early game. Next we get Valor, then Ki Burst, and mostly train these throughout our levels. We train Broken Wings slowly because it has a pretty high attack damage ratio, and it doesn't get any cooldown reductions. We train Valor to 5 first because it's an off-tank build, and you want to get as much "tankiness" as possible.

You want to try and last hit a group of minions with either Broken Wings or Ki Burst. If you want to get them when they're around 3/4 or 1/2 health, try using a combo of 3 strikes of Broken Wings and a Ki Burst. That usually takes them out if they're under full health.

1
This is where the Wraith and the three Lesser Wraiths are. This is where you start off. Engage by smiting the big Wraith, then take on the 3 Lesser Wraiths with Broken Wings and basic attacks. Once 1-2 Lesser Wraiths are dead (depending on your health) pop out a health potion.

2
Now head over to the wolves quickly. You want to make sure you engage the big wolf while your health potion is still up. Make sure not to waste Runic Blade on the smaller wolves, use all or however many Runic Blade stacks it takes to kill the big wolf.

3
You are going to recall now. The reason why we don't go straight to the golems is because we need a long sword to deal more damage because we're getting Red Buff after the golems. Yes you could recall after killing the golems, but with the long sword you can kill them faster which means you can get your Red Buff faster.

4
Now we head over to the golems. Use Broken Wings and Ki Burst to engage, but do not use Smite. Use your Runic Blade stacks on the golem with the highest health (or either if on same health). After killing one golem, pop out a health potion and move on to the next.

5
Again, you want to try and make it to Red Buff while you have a health potion on. Engage the Lizard with Valor, Broken Wings and Ki Burst, in that order. Use your stacks on Red Buff. Once it's down 1/2 or 1/3 health, use Smite. After getting Red Buff you might want to gank bottom or middle lane if they need it.

6
Next, head to Blue Buff. Start off with Valor, then Ki Burst the Golem, and use Broken Wings. Use all 3 stacks of Runic Blade on Blue Buff, as he is the main target. After obtaining blue, go far a gank to top or mid (only if necessary).

7
Recall, buy whatever you can and repeat route.

Personally, I don't think Ranked Play with Riven isn't that good, but here are some tips if you are going into Ranked Play with her:
- Mostly lane, don't jungle unless you're really good
- Try and farm more
- Gank mostly as a team

Laning
Pros:
- More farm
- Teamwork
Cons:
- Less ganks
- Possibly less kills

Jungling
Pros:
- More gold
- More ganks with buffs

Cons:
- Longer build
- Takes longer to complete the build