Working On Getresponse Deliverability

Right now I'm trying to fix my Getresponse deliverability. I've had this account for over a year and didn't know much about email marketing. Now I'm serious about email marketing, but I feel like my deliverability is bad because of all my mistakes. I have checked my spam score and now it's at .011, when zero means it's most likely not spam. Now I'm deleting my inactive leads to try to eliminate bounces. I'm trying to prevent my emails from going to the spam folder. Hopefully I get this fixed so I can send more traffic to my capture page.