Just a few simple bullet points. Some of these are strictly for teenage boys, however. 

When dressing for a wedding, job interview, nice date, etc

• Your socks should be the same color as your slacks. 
• Know how to tie a necktie/bowtie. You shouldn’t be relying on your mother or father.
• Shirts unbuttoned to halfway down your chest does not make you look “cool” it makes you look sleazy. Dressed up = buttoned up.
• The same goes with jewelry. Less is more. Wear a nice watch (no plastic) and keep away from man rings. Far away. 
• Now this one is specifically for teenage boys. Sneakers are for wearing with gym shorts. Not with dress pants. 
• And lastly, shirts should always be tucked in. 

-Mia