Hey guys,
this is my first guide and I´am gonna show you a Jungle-Guide with one of my favorite champions: Lee Sin

Lee Sin is a very powerful champion and he can put a lot of early pressure on lanes.
Additionally his basic damage and outstandingly mobility make him to one of the greatest and best jungler.

In this chapter I will show you my items I use against more AP-based enemies (also: AP enemy is fed).

At the beginning I start as following:
Boots + 3x Health Potion
Doran's Blade + Madred's Razors --> Wriggle's Lantern
Mercury's Treads

After purchasing these items, I often buy Hexdrinker to get Maw of Malmortius
AP-Champions will do much less damage now and you are able to gank their lanes without any worries :D

From this time you can continue your general itembuild. Then I ususally buy Phage to slow´em better and to get more life. Accordingly I will buy Frozen Mallet or if my team does not that damage we require, I will buy Trinity Force to be lightly tanky and more powerful. Now you can sell your Doran's Blade.
If your team does good damage, you dont have to buy more attack damage items (how about buying Warmog's Armor?). At least you can decide what´s better for you and your team: I almost buy Force of Nature

This chapter is similar to the previous one, but in relation to AD-based enemies.

You will start like this:
Boots + 3x Health Potion
Doran's Blade + Madred's Razors --> Wriggle's Lantern
Ninja Tabi

Logically you have to buy more armor & health.
I usually buy one Chain Vest to endure more damage.
Then I purchase Giant's Belt to get Warmog's Armor.
After that I will use my Chain Vest to get Atma's Impaler, because its passive depends with your health. From this time, you can sell your Doran's Blade. Now you are very tanky and maybe you will need more magic resist (--> Maw of Malmortius) or just more attack damage (--> Bloodthirster)

Like the topic of this chapter is named, I will show you my itembuild against a kind of more tanky team.

Boots + 3x Health Potion
Doran's Blade + Madred's Razors --> Wriggle's Lantern
Mercury's Treads

Then I almost buy Phage to get Frozen Mallet for slowing the enemies without any buffs.
After this I buy attack damage, lifesteal and maybe armor penetration.
Bloodthirster, Trinity Force, Atma's Impaler and Last Whisper.
After my sale of Doran's Blade I will buy a Guardian Angel or Maw of Malmortius.

Lee Sin is a very mobile champion. So it´s easy to escape or gank.
Use your Sonic Wave (q-spell) on an enemy minion / monster in jungle to escape or to go there.
You also can use your Safeguard (w-spell) on an ally champion, minion or a ward.
Dont forget to slow your enemies with your Cripple (e-spell) before you try to escape! This increases the chance to escape!

Your ultimate could be also very useful to escape / kill an enemy seperately.
But this is a kind of expert-level, because you need the right situation and timing.
Do your Sonic Wave on an especially target, kick him with your Dragon's Rage (ultimate) over a wall, to seperate him from his team, and hit the q-spell button again ( Resonating Strike) to be with him. Now you two are alone and you can kill him or escape easier.
You also can kick a champion back, who´s standing in front of his team, that he will fly through his allies. All the enemies, who were hit, will jump high for a while. This gives you more time to escape.

There are also much more variations with Lee Sin, but I dont want to write´em down here right now, because nobody will read a novel :D

I hope you like my first guide and yeah...enjoy it!
Dont be shy to ask for something.
Write your comments below.

Thanks for reading,
beathaven