Kaizen 1: Do not skip breakfast ...

Missing breakfast can be seen as a way of saving time in the morning, or of losing weight. During early and mid-adolescence, disordered eating patterns are very strongly associated with health-compromising behaviours like use of tobacco, alcohol and marijuana."
Especillay in case of bachelors, they replace the breakfast with coffee and few puffs(smoking). This is really unhealthy and leads to irregular functionalities of many systems(digestive system, circulatory system).

BreakFast - breaking the fast
After nine or more hours of not eating (that is after your dinner), you are in a fasting condition. Blood glucose levels are very low and need to be replenished. To keep up mental work requires a large turnover of brain glucose. If glucose levels are inadequate, the brain cannot function efficiently. Breakfast helps to replenish blood glucose levels.

For School going children:
Studies of school-children have shown eating breakfast improves their concentration levels in the morning. There are multiple scientific studies that show that eating breakfast improves academic performance, including improved maths scores, better working memory and increased verbal skills. The studies also show an improved attitude towards school, as well as less depression, anxiety and hyperactivity.

For Obesed people:
People who were trying to lose weight were more successful if they had breakfast. And those who missed the meal were likely to be fatter, possibly because they are more likely to have unhealthy snacks mid-morning to boost their energy levels.

Skipping breakfast - U may fall prey for one of the below:
Is your friend restricting her food intake day and night? If so, he/she certainly is at risk for nutritional deficiencies. Some of these may include anemia, stunted growth (depending on her/his age), loss of bone or incomplete bone development, decreased immune function, amenorrhea (loss of menstrual periods in case of ladies), decreased thyroid function, increased susceptibility to colds and infections, low energy levels, poor concentration and cognitive development, and gum infections and poor dental health, just to name a few.

References:
http://www.goaskalice.columbia.edu/2296.html
http://www.medicalnewstoday.com/medicalnews.php?newsid=4004
http://www.ucdmc.ucdavis.edu/healthjournal/sep_oct_97_hj/articles/skipping_1.html
http://www.ivillage.co.uk/parenting/school/schheat/qas/0,,186627_187071,00.html