Cut out sugar. Sugar can give you a sugar spike and afterwards make you feel tyred, plenty of fresh air walking ,cycling, swiming any tupe of activity that gets you away from the TV and munching on sweets and biscuits .
I have a juicer and make sweet drinks with all the health benafits with out the need for proccesed sugar.
Porridge every morning with bannas or any other fruit and to make it more interesting add
cinnamon and a dab of honey. Iam a keen cyclist 62 years of age and can cycle 110 miles in one day and put to shame pepole half my age. Thats what GOOD food does for you