On the multiple ways, I was sure I read a post that documented them all and had me nodding along but can't find it, this one seems good though [1].
[1] http://ceronman.com/2012/09/17/coffeescript-less-typing-bad-...
[1] http://ceronman.com/2012/09/17/coffeescript-less-typing-bad-...
I haven't come up with a better approach than simply agreeing on a convention with your team though TBH. It's not too bad when everyone's on the same page and familiar with the gotchas (same could be said for most langs).
I put together a post comparing some of the syntax differences as it relates to building ReactJS components in case you're interested: http://rapin.com/blog/2015/02/03/reactjs-with-coffeescript/
Given that JS itself has quite a few different ways to do things though, it's kind of a wash.