Which server are you on and which region are you located closet in the real world (US West, US East, Australia or EU)? If you’re on a server that is not located within your specific area and your network speeds are not that great, I can only recommend trying to stay on servers that are local to your region.
If this isn’t the case, and as mentioned in your other thread on the same subject, your best bet is to look through this FAQ entry…
… and also this one …
… and lastly … can you do some speed tests of your connection by following this thread …