Guy Cribb's "Missink Link" core skill helped me a lot some years ago with early planning:
www.guycribb.com/userfiles/documents/The%20Missing%20Link.pdfCribb's technique tips are top notch, in general. Probably just the same techniques and tips than every body else but they are phrased in very easy to remember ways in the water (like "hanging as a monkey" to initiate planning when barely powered)
It is a pity that his website uses outdated Flash Player and much info is no easily accessible
Hope it helps!
Marc