Here are my top three rules for getting dressed:
1. Make sure your clothes fit. There is nothing more annoying than seeing guys with baggy shirts, shorts etc. You need to make yourself presentable in public.
2. Do not follow trends. It may be tempting to try and wear skinny jeans, but if you know your body type does not allow for this, than please refrain form the utter embarrassment!
3. Always be true to yourself. Don't try to be something that your not. Make sure you are comfortable in your clothes and that YOU are happy.