I got an SMS today that said: "Life is partly what we make it, and partly what it is made by the friends we choose." This completely ties up with the idea I had earlier thanks to a comment by Shashi. (As we all know by now, coincidences don't just happen by chance!)
Like attracts like, as the law goes, so we usually end up making friends with people we have something in common with. When we need someone to talk to, we naturally reach out to these buddies, and they in turn give us advice based on which we make some key life decisions. So, as the old wives' saying goes, keep good company. In one word, 'satsang' (truth + company). Our friends keep us in high spirits, keep us positive and happy, and are a vital part of our life choices. Choose them with care.
Besides friends, we usually have other avenues of communicating, learning and community living. I think these too are important parts of our thinking process. The books you read, the websites you visit, the movies you watch, the parties you attend... All these shape us in subtle ways, adding layer on layer of subconscious responses. While we can hardly control the various messages we are bombarded with on a day-to-day basis from advertisements, television and other media, we can filter the ones we do have control over. If we have to read a book or watch a movie, may as well make it a meaningful one. If we have to socialise, may as well do it with those who enrich us.
Then, when the time comes for us to make the most important decisions of our lives, we have stronger tools and more courageous people to lean on. And that, as the great poet said, makes all the difference.