As stupididiot69er suggested, the more files you share, the easier it is to get connected. There's 2 main reasons for this. Many people only allow those sharing a certain no. of files to connect with them, be that 5, 50 or 500 for example. Also those that upld from you allow you to connect to other peers & not ony improve your connection quality but also improves your search results.
If you search for sources it will help a file to connect. And using a search & dwnld technique is important here's an example of what I mean (click on link.)