How to beat a cruise ship casino

Cruise ship casinos work a bit different from their land based counterparts. To start with they're obviously a lot smaller. They're also much more focused on entertaining you rather than emptying your wallet.
That being said however they're still, at heart, a casino and all casinos the world over tend to operate on the same rule, "the house always wins".
There are however a few simple rules you can follow that, whilst they may seem obvious, should give you an edge.