Regarding www heaven4casinos com (and other sites most likely):
Your domainname is heaven4casinos and first thing I noticed when visited your sites homepage is Top 10 online casinos section (this is OK), but why in the heck is this your homepage title “Video slot reviews Video slot bonuses online slot casinos and casino software”. Especially when you have dedicated video slots section on “www heaven4casinos.com/slots-a-z” and homepage contains nothing about slots reviews except in recent post module. Also you can’t target all this high competitive keywords (video slots reviews, video slots bonuses, online slot casinos, casino software) with one page.
You have duplicated titles so I suggest to change homepage in something like top online casinos or even longer phrase.
Sorry for my bad english