Sales Funnel Diagnostics (For Newbies)

Hey Warriors,

I dont post here often at all, I'm too busy cranking out hours spent on my various business'.

Anyway, trouble with a sales funnel? Here's my 'basic' trail of thought when figuring out what's up.
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Problem: I'm getting traffic to my squeeze page but no opt-ins, or very little opt-ins

Possible Solution: You aren't sending the right traffic, or the page itself needs optimizing.
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Problem: I'm getting opt-ins and I've got a good opt-in rate but I'm not getting any clicks on my affiliate links, or nobody is opening my emails.

Possible Solution: Email subject lines are weak, actual emails need to be more compelling with better calls to action.
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Problem: I have good email open rates and I am getting clicks to my offer but little to no sales.

Possible Solution: The offer itself isn't well matched to your list. Switch it up and test.
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So there you go. Of course it's basic and there are other variables but as a rule of thumb if you stick with that you can identify why you aren't making money with your sales funnel by checking which part of it is broken.