Tips to Use Pudge (Dota2)

• Meat Hook to Rot to Dismember is the standard combo.

• Meat Hook is hard to master but extremely versatile; it can be used to:
  • Pull a fleeing enemy into a gank, or back into one if they blinked away.
  • Pull a lone hero into your team to make any resulting teamfight 4v5.
  • Pull an allied hero out of a dangerous situation.

• However, in case the enemy has some sort of AoE initiation skill (Echo Slam, Epicenter, Requiem of Souls, Sanity's Eclipse etc.), it's usually better to avoid hooking at all to start teamfight, lest you set up a perfect initiation for the other team. The reason is after you hook someone and your team converge on you to kill the target, you will act as a beacon for those skills, especially if they have a Blink Dagger.

• An easy way to land a Meat Hook is to walk up to your enemy slow him with Rot and finish him off with a Meat hook, while they are slowed.

• Hiding spots and hooking positions: [1].

• Don't be afraid to use Rot to escape from a chasing melee hero. Toggle it quickly on and off to apply the speed debuff to them, with minimal damage to yourself.

• If you are Dismembering and have not used Meat Hook, make sure to not shift queue it because it can easily be dodged by running to the left or right.

• If you have Aghanim's Scepter and are low on health you can Dismember a creep to quickly restore a lot of HP.

• Blink Dagger can be bought on Pudge. If you hook a unit onto an unpathable ledge, the unit gains free pathing for 5 seconds.

• Pudge can use Rot to deny himself, committing suicide and preventing the other team from receiving gold and experience for his death; killing himself in this way does not, however, reset his killing spree, resulting in the other team receiving more gold for killing him if he continues his spree.

• Keep in mind that the range on Flesh Heap is relatively small; you will not gain a charge if your Meat Hook kills someone outright (i.e. with the impact damage) from long range for example. Try to keep yourself in close proximity to enemies nearing death to maximize your strength gains over the course of a match. 

 source: http://dota2.gamepedia.com/Pudge