There's 2 good ways. 1. Magnet Links & 2. Direct connect.
I would recommend Magnet links since direct connect is not always easy. And you need to make sure your firewalls are properly configured. Do this test:
Bug Report instructions & sample image Is the result True/False? If False then your firewall is not properly configured. See
Firewall configuration instructions (click on link) (advisable not to have 2 active firewalls b/c they can interfere with each other.)
See
How to use Bitzi Web Lookup ... & How to use Magnet Links & Direct Connect