I got off to a relatively good start mainly because my employer decided to support it
I am still far away from reaching my target though.
I tried promoting the campaign via paid ads on Facebook. I was on a tight budged and reached about 5000 users in two days, but none of them were converted into campaign support. Interestingly enough, Facebook ads worked really well when promoting the page I created for my game. Though I suspect those might be serial likers
I have heard that posting a link to your game on reddit might help too. I am about to try that. And I read somewhere that Kickstarter is more likely to show your campaign on their front page if there is a lot of activity on your campaign page. So I am trying to get people to at least comment and visit my page if they are not really interested into supporting it.
Best of luck with your campaign!