It really depends on what fish you have. With my tank, I put in a full blister pack of frozen bloodworms a day, some flake, and some defrosted prawns (every other day or so), as well as some ciclid sticks and plecy pills.
I tend to pop the bloodworms straight out of the freezer into the tank. The fish if big, will take a block or others smaller ones allows the cubes to defrost a little and eat the defrosted worms. Dont forget, with your heater or in my case two 300w heaters, the worms do not stay frozen for long.
I feed this way because the bigger fish do not want to be swimming around for ages trying to pick up single bloodworms, so those that need to, can have a cube to themselves. The smaller fish pick off the defrosted bits.