Correct settings for ssl protocols" and "ssl ciphers"

I have the following two settings in my "10-ssl.conf" file

# SSL protocols to use ssl_protocols = !SSLv2

# SSL ciphers to use ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL

I have seen different configurations while Googling. I am wondering what the consensus is for the best settings for these two items. What do the developers recommend?

Thanks!

-- Jerry