Everything I need to know in life I learned in a singles bar.

First impressions matter, whether you are choosing the title for a paper on quantum cosmology, or introducing yourself to someone with whom you wish to engage.

In interacting with others, confidence, genuine concern, a warm smile, and charm are effective in winning friends and influencing people.

 
Not every venture results in success: know when to exit, and do so gracefully. Avoid denial and wasting resources on lost causes, and keep in mind that what goes around comes around,  so don’t burn any bridges (unless they are connected to a toxic waste dump!)