Very basic combos:
And then we have ward combo:
Ward+W.
Q + Flash (Or ward behind the enemy) and R to the back (of your team or turret) and Q again.
Then we have Q+R+Q ignite.
If the enemy it's less then 20% of life (depending of the enemy) you can try do R+Ignite
If you are fighting 1v1 to a melee try to use your passive all the time like this Q 2 hit's passive and Q again E 2 hit's of passive E again 2 hit's of passive .When you are fighting 1v1 always use your W gives you a little of shield and life steal and spell vamp on the second cast.

Men just focus on farm don't let the big minion die . Always use your passive TO FARM!!!
And ALWAYS BUY A WARD . If you can't just kill him yet, just farm. Wait for your jungler to gank then is your chance to kill the enemy. It's easy.

Lee sin players usually say they can't beat a Trundle. I will show you how:
Trundle got high sustain through his passive witch means he will keep his health high, reducing damage from Lee Sin Q. R will seriously mess with Lee sin defenses. I really recommend you to switch lanes with a teammate. Try your best, focus on farm and get your jungler and midlane to help.

Udyr got sustain through is W and high damage throughout the game due to is Q is totally unmatchable by Lee Sin. Try to farm to get gold, use W to burn his mana. Get your jungler to gank him as Udyr's only escape comes in the form of Bear Stance but it's only a movement speed buff.

Garen it's quite of an annoying guy with a sword. He is always running towards you, silencing and dmging you, that's quite annoying what you have to do is try to keep the distance of his Q and E. When he uses them both then you should attack with your Q-Q and W on your minion. Easy.
When he is chasing you for a kill try to shield yourself (preferably on a minion) or use your R to move him away from you. That way he can't kill you easily

Thx alot for the view's and KILL THEM ALL =P BYE
LoL Eu west : Powerwolf777