Move Whole Site To WordPress

Hey Guys,

So, to the point, i'm looking to move one of my websites from being a standalone sites, which currently runs using basic php includes and a lot of work - http://www.liveroulette.co.uk/ - to WordPress. I was wondering if i could get a bit of guidance, some best practices to watch out for or just thoughts on whether it's a good idea.

I figure it's a decent CMS which i can use to maintain the site better!

Cheers
Mike