If the business next to you needs to buy a new copier and you know someone who can get them a discount, make a phone call. If you are not going to take on a potential new client but you feel comfortable making a referral to your office mate, do it. If your little sister can sub in as a receptionist while they look for a replacement, offer it and make it happen. These little gestures often take minutes of your time, but they can have a lasting impact with people just getting to know you.