Tarantulas need to be fed live prey so that they can kill their food themselves. Tarantulas love to eat crickets, locusts, grasshoppers, earthworms and beetles, and will happily eat four large crickets per week. The insects can be given to your tarantula all at once, and once a week should be sufficient. These insects are readily available at most large pet shops so you will be able to get hold of them easily.
Try not to overfeed your tarantula, as their abdomen should never get to twice the size of their cephalothorax. Overfeeding can have a negative effect when your spider is ready to moult.
When your spider has finished eating, there will be indigestible leftovers in the tank that they have left behind. These should be removed straight away, preferably with tweezers just to be on the safe side and avoid your spider attacking if he feels scared.
Your spider should always have access to a fresh supply of drinking water.