1. These laws only apply to a meal that is eaten after midday and it is the final meal before the fast. However, a meal eaten before midday (even if it is his final meal) or a meal eaten after midday that is not his last meal before the fast, doesn’t have the above restrictions. 

Therefore the practice is to have a regular meal earlier in the afternoon, and then later, before sunset we eat the סעודה מפסקת. However, one must be very careful not to satiate himself completely with this earlier meal, until the point that the סעודה מפסקת will be repulsive to him and just being eaten as a snack to satisfy the requirement. The reason for this is, because if he fills himself by this earlier meal, it will be considered his סעודה מפסקת and all the above restriction will apply.

Therefore one should eat a regular meal with moderation and earlier in the afternoon to allow a big time span between the meal and the סעודה מפסקת.

2. After the סעודה מפסקת one may eat or drink until שקיעה ,sunset unless one orally accepted the fast at that time.

3. If one orally accepted the fast after the סעודה מפסקת all the prohibitions of Tishah B’Av apply, except for wearing shoes which do not have to be removed until before sunset.