I keep the older stuff up because some people want to sway that way and the stuff I wrote (IMVVVHO) is more clearly written and easy to follow than on some of the other sites.
No worries if you don't like coffee.
Any kind of alcohol has seemed to be effective. Whatever you like.
Every 4 days is just an easy way to be in with one attempt in the fertile window for most people. You don't really have to think about it, so it's just all very effortless.