What sort of thing are you going for... general or a specific theme?
The thing with sculpting is that you will get fifty different tips for the same thing, some will work for you and others won't and you could be the unlucky one that gets discouraged before you reach the ones that work.
You mentioned about leaving the Green Stuff for five minutes before starting... I don't... I use it straight away and any that I am not using will be stuck to my hand to keep it warm and pliable.
I am a great advocate of just going for it and learning through trial and error. You will find what works for you by practicing... it is something that takes time.
A tutorial or guide may be great but it may be complete rubbish for your particular way of sculpting.
General advice is:
Try different putties to find out which one you like best.
Keep your tools clean and when using them, keep them moist.
Build onto a frame/armature.
Work in layers and don't be afraid to stop.
Practice... practice... practice... practice...
Every sculpt failure is a lesson learned.