Need to get from Guangzhou Baiyun airport to Doubletree Hotel...what is the best way. Thanks

Do you refer to the DoubleTree By Hilton? If so, you can take airport shuttle bus line 1 to Aviation Ticket Office ( GZ Railway Station) and then take a taxi to your hotel within 10min.

Or take subway line 3 to Jiahewanggang, where transfer to line 2 to get off at Memorial Hall of Sun Yat-sen. Then get out from exit D2 to walk for around 900m to reach!