All right, the image is sort of a joke (will explain later), but it still applies to my post.
Short story short: Quality > Quantity
If you're going to do something, do it well enough to avoid doing it the second time.
This makes me put in the best effort in everything that I do. Going back to do something the second time is a time waster if you knew it can be done right the first time. Even writing this post, I'm putting in my best effort into editing it, explaining it, and making it easy and enjoyable to read—to avoid going back and fixing any grammatical errors.
To explain why I have that meme on top of this post, think of your top 5 people who matters in your life.
Now let me ask you, was Justin Bieber one of them? How about the President of the United States?
More than likely not.
The people who you remember are the quality ones that you should spend more time around. Remember that it's not always about being popular. It's not always about having more quantity.