Hello for the vast majority of people this is a breakfast that works :
2 wheat biscs with 250ml of semmi skimmed milk
A drink of water
1 banana not long before you leave the house
Make sure that you walk your banana on ( eat your banana wait untill it's settled in your tummy and go for a walk or paly some games that include physical activity ) . Unless you have any health conditions that prevent you from eating breakfast in this way you should start your day as described and never change .