One thing that can be said about The Sims, the game did put a lot of value on friendship!
Friendship has always been a powerful tool in The Sims, and to do well in its simulated life, a Sim should pursue new friendships and maintain old ones. When this happened, a Sim's career, health, and happiness all did better!
Some more tips learned from The Sims:
Friends and Fun are as important as Eating and Sleeping.
Yup, when maintaining your sims health and happiness, the bar that measured input for fun and social activities carried as much weight as the bar that measured if your sim was hungry, tired, or had to go to the bathroom.
With recent studies coming out to show that good friendships actually do make people live longer, healthier, happier lives, they must have been on to something!
Friendships are like plants; if you don't water them, they die.
Ah, the poetry of The Sims. Through metaphors, we were taught that we must work actively to maintain our friendships - that means calls, visits, and good quality time. It's a simple formula, but still probably more effective than just liking your buddie's Facebook posts..
It's nice to share gifts sometimes.
Remember when your sim would get a visit from a friend, and that friend would coming bearing a small gift, like a plant or some chocolates? That gift was always happily received!
While the Sims were at one time pretty traditional in their gifts, there are so many small gifts we can bring when visiting our friends - some fresh produce from your garden, in a little basket, a batch of homemade cookies, a funny souvenir from your vacation - surprise and delight your real-life friends with small gifts from time to time, and you, too, can be a good friend like your old sim neighbours and friends!
Your friends can help you reach your career goals.
In the Sims, to get that next promotion, there was always a friends requirement. (Unless you had a good cheat code.)
In real life, friends can help you with your career too - they can help you find a job, volunteer for your company event, or just be there to listen to you complain about your boss.