If you want to help out, you should decide whether you want to run a normal Tor relay or a bridge relay. You can configure your bridge either manually or graphically:
SocksPort 0
ORPort auto
BridgeRelay 1
Exitpolicy reject *:*
When configured as a bridge, your server will not appear in the public Tor network.
Your bridge relay will automatically publish its address to the bridge authority, which will give it out via https or email as above. You can construct the bridge address using the format above (you can find the fingerprint in your Tor log files or in /var/lib/tor/fingerprint depending on your platform).
If you would like to learn more about our bridge design from a technical standpoint, please read the Tor bridges specification. If you're interested in running an unpublished bridge or other non-standard uses, please do read the specification.