I don't know about you, but I have been the recipient of the "five minute favour." As Adam Grant says in the below article, it can be like a "microloan of your time, skills or network". Things as easy as answering that question from one of your connections or connecting two people in your network can make a big difference. I have found that people remember those favours and are more than happy help you out as well. Bottom line, it is never too early to give back.
“A five minute favor is just a small way to add large value to other people’s lives,”