Choose a name for the bird and use it each time when you approach him. At the end of the day the cockatiel will recognize his name and will understand that you are calling him. Also you should use his name and call it softly each time when you give him food .By doing this, you will make training cockatiel process easier and your bird will trust you by hearing your voice.Respect your bird, show him that you are friend and treat him as a friend. 

Call his name and talk to him each time you approach him or when you feed him, try to understand which his favorite food is and reward him with it whenever he behaves in the desired way during training cockatiels.The second stage for training cockatiels is to accept your presence while you are feeding him, do not just leave the food, wait near the cage and observe him .If the cockatiel hesitates to take the food, encourage him by moving a few steps away from the cage. 

At the moment when he takes the food without hesitation you will know what is his own space is. Do this exercise every day and you will notice that this space will become smaller and smaller and the distance will be shorter. Of course you have to be patient because it will take time. Be sure that the bird is comfortable, if you notice that the cockatiel is tense and nervous; enlarge the distance between you and the bird. Drywall Screws Wholesalers is very important and the only way to win his trust.When the second stage is fully completed, it is the time for the third stage. 

Now you have to train cockatiels to take food from your hand. You can start by giving him his favorite food by standing by the cage. Reduce the amount of the food so the bird might need more. Show him that you are holding his food in your hand and offer it to him for him to take it. If the cockatiel refuses to do it, just leave the food in the food container .

Repeat this activity until the bird feels more confident and takes the food from your hand. It is important for you to give him additional amount of his favorite food to his normal diet from your hand. Do not starve him, it is not ethical and may slow down the process. It may take several months to achieve this; it depends on individual characteristics of your bird.