Troubleshooting most encountered BGP issues

[i mawsog via NANOG <nanog () nanog org>]

Trying  to make a  check list  for  troubleshooting  common BGP issues .  The list is as follows. 
Configuration issues :
1.  Incorrect MD52.  Incorrect peer ASN, IP 

Runtime issues :
1.  Path flap 2.  Path hijack 

Would like to grow this  list with appropriate pointers and details.  Or, if anyone is aware of  such such a list's 
existence , would be glad to added to that .