Hey all! This is my first guide so its really for my own use as I'm forgetful. If your looking for tactics this may not be the guide for you as I'm no MLG pro. If you like it thumbs it up :)
Inspiration from RYS ABERDEEN's Volibear Build.

Summoner Spells.

1.Smite - Due to me junlging Spite is a must have in order to kill the buffs quickly, and solo dragon at around lvl 9.

Skill Sequence.

I take Majestic Roar first for its fear ability on jungle creatures.

I then max out Frenzy as soon as possible as its the only skill, apart from the ulti, that does any damage.

I take Rolling Thunder at 3 and Ulti at 5(obv).

Then after Frenzy is maxed i max majestic roar.

Item Choices.
I start out by building my Wriggle's Lantern in order to jungle effectively.

I quickly add Boots of Speed to enable me to chase my enemies and Rolling Thunder them easier. Another choice is Boots of mobility which is useful when moving from buff to buff and then to gank in top speed.

I then build Thornmail as I often find that I take too much damage from each gank and generally my enemies are AD. If the majority of enemies are AP then take Force of Nature early on and Thornmail later. I take both by the end to fully tank my self out as if you have managed to build both following my order then usually you are hitting 1 hour+ meaning that the enemy would have built the majority of their items too. This means you will be susceptible to both AD and AP.

Then I build Warmog's Armor. This gives me much needed Health, as by now you should have good armor/ magic resistance, so that you are a certified tank-bear. You can take Warmog's before Thornmail/ Force of Nature if you feel that you do not have enough health. I prefer to take it after as early on I assist my team with Rolling Thunder and Majestic Roar meaning that I just need to block the initial damage taken from ganking without having to commit myself to a fight, which more health would be best for.

Next I add Atma's Impaler due to its passive of converting health in damage. This goes nicely with Warmog's armor and insures that you do the damage necessary for others to fear you.

Next I build Force of Nature (or Thornmail) for the reasons I have already stated.

Finally I build Frozen Mallet to add more health and damage. (the main bulk of damage as a result of Atma's Impaler) Another Choices is Rod of Ages for health and AP (If you are focusing on spread AP damage with your Ulti)

Jungling.

First off a take Blue. You don't need to have an ally but if it helps you can. I can usually solo it. Remember to take and use a couple of health potions just in case and to use smite.

Next take out the wolves. This is just until my smite cools down.

Now take out Red. After you have both the buffs you can start ganking but you may need to recall first.

Once buffs run out farm at top or mid until they re-spawn or just generally help your team.

Repeat process.

At around lvl 9 WITH BUFFS you should be able to solo dragon.