You'll get the most mileage out of anything centered around a personal goal or interest -- the more personal and genuine and less superficial the goal or intere

You'll get the most mileage out of anything centered around a personal goal or interest -- the more personal and genuine and less superficial the goal or interest is, the better. As an example, schools (as a student or postgrad) and religious groups (if you're religious) are very good if you're genuine in your involvement. Also, social events connected in some way to people you already know (both family and friends) provide an incredibly high degree of optionality in all sorts of ways, including potential relationships.