OK -- if you're using it as an authoratative name server (i.e. it is resoving names for a domain) you can simply check to see if it resolves names correctly, for instance do "dig host.yourdomain.com" from somewhere outside of your DNS server's network and see if the correct answer comes from the correct server. If you're using it as a caching nameserver (i.e. to look up names for you/your network) use "dig @server_ip_address somehost.somedomain.com" and see if it's able to give you an answer. If so, things are probably working.
Also, BIND dumps a fair amount of logging data, usually to /var/log/messages (depending how your syslod is configured). Read it and look for problems. If you're trying to troubleshoot something specific post it here and we can probably help more. Hope this helps.