Hey greencode, here i will give some of the tips, hope it will be useful for you
# Remove anything that may be causing your dog discomfort or fear
# Provide lots of toys and items to keep your dog amused
# Spend lots of time with your dog
# Ensure your dog feels safe
# Understand when your dog is barking to communicate
# Exercise your dog regularly
# Don't reinforce anxiety barking
# Remove any potential "triggers" from the dog's environment
# Praise your dog for barking at appropriate times
# Give your dog a treat when it sees things that previously have made it bark
Merry Christmas 