-Landing Q Sonic Wave / Resonating Strike is difficult and at times feels almost buggy. You will notice what I'm talking about when playing Lee Sin yourself. The projectile animation and the hit box do not always feel entirely true to one another. Work at it, and with practice you'll learn how to land his Q Sonic Wave / Resonating Strike more often. Sometimes this means getting right next to them and shooting a Q Sonic Wave / Resonating Strike that cannot miss to be safe.

-Plan your escape routes. You have escape mechanisms. Plan your exit path BEFORE you have to exit. Is there a wave of minions coming that you can jump to when they reach the lane? Do you have wards in your inventory that you can quickly place and jump to with W Safeguard / Iron Will? is there a wall that you can ward hop over? Always keep 2-3 wards in your inventory, as this makes Lee Sin borderline impossible to kill. It feels like you picked Spider Man in your champ select when you have a few wards on Lee Sin. (P.S. Riot, if you read this... Spider Man skin... Do it...)

-Q Sonic Wave / Resonating Strike to minions in jungle and dash to them to escape champions chasing you in the jungle. Have your ward and W Safeguard / Iron Will ready to continue farther over other walls IF they flash after you. This is a great way to escape and make people burn flashes as well.

-Abuse your insane sustain! Lee Sin sustain in lane is among the highest in the entire game! That's unbelievably important in a solo lane, where all other sustain champions are being nerfed one by one, and even life steal items are being nerfed as well. Get points 3 into W Safeguard / Iron Will, and you'll feel in control of most solo top lanes. Get 5 and you'll just laugh the lane away.

-When comboing skills and attacks for damage trades in lane, it's generally better to only attack once inbetween your skills. This is because the longer a trade lasts, the more opportunity an opponent has to deal damage back to you as well. A quick bursty combo, landing auto attacks inbetween and immediately chaining your skills with them is the most efficient way to win trades. Waiting for auto attack to reset is wasted time where you're not dealing damage, which might cause you to lose a trade.

-When comboing skills and attacks for sustain, and/or to push lanes or jungle, it's generally better to attack twice between your skills in lane. This is because each hit will Heal Lee Sin a lot, and your skills are used to keep your attack speed buff on to maximize your auto attack output, which also means you're maximizing your healing per W Safeguard / Iron Will activation.

-When casting your ultimate Dragon's Rage, evaluate what you are trying to accomplish. If you're using it for damage because you built full AD, you can kick at any time in a fight to maximize damage. When building offtanky, the damage is still good, but consider landing the kick for the disable effect more than the damage in fights. Consider the timing and how it will impact your opponent's team-fight dynamic.