I find that shots to chest is especially good for getting unexpected wafts of the scent during the day, as it escapes from the neck.
You should consider spraying to the back of your knees. It's your skin, and people rarely layer their legs.
It's a warm environment, the scent escapes from the cuffs of your trousers.
Works good for sillage IMO.
I've seen some people spraying the inside of their jacket, or under the lapels. May want to try them as well.