In the web and many other interfaces (e.g., Android client), StatusNet features a Repeat button with each notice (alongside Fave and Reply buttons). The Repeat button looks like a recycle symbol.
If your interface features the Repeat button, just click Repeat! No need to read the manual repeating instructions below.
 Manual Repeating
Avoid duplicates to groups. If the notice includes a group name, prefixed with an exclamation mark:
- remove that exclamation mark before re-sending
- optional: replace ! with # to leave a hash tag in place of the group link (example). Some client software has settings to do this for automatically.
(Please note that if you use the statuses/retweet API method, repeated notices which include a group name won't be duplicated in groups timeline.)
Symbols such as ♺ are unrecognizable to some clients. If in doubt use the RD prefix
 Further reading
Please read http://status.net/wiki/Identiquette#Redenting for more advice about redenting, including propagation to Twitter (where relevant).