There are numerous ways to promote hubs. The best way I use is to share my hubs on my social accounts and if my follower or friends like my share they share them to their friends.
You should must add summary on your hubs.
Share it on Su.pr, you'll need stumble upon account, once you loin just past your hub and thumbs up you'll get 50 to 60 few in few minutes:)
Share it on Google plus.
Increase your followers on HubPages
Reply each comment you get on your hubs
Hope it will helps you to boost up traffic on your hubs.
I've got 1000 views in just few days on my hubs.