If you're starting to investigate your options for deploying IPv6 within your existing IPv4 network, wouldn't it be nice if you had a thorough yet concise summary of your options in one place? There are a dizzying number of alternatives, and deciding which ones to consider and further investigate can take time. If you're operating a network for an enterprise, perhaps dual stack, ISATAP, 6to4 or a translation technology would work best. Or as a service provider, perhaps 6rd, dual-stack lite, or NAT64 would better meet the needs of your business.
So if you're looking for a concise guide...well, actually two guides...as a starting point, check out these two free white papers at the top of the list. I've just published an update to my IP4v-IPv6 Co-Existence Strategies white paper and a new white paper entitled Service Provider IPv6 Deployment Strategies. The former paper is broadly applicable though more focused on enterprise IPv4-IPv6 co-existence strategies, while the latter is focused on service provider techniques. Hopefully these papers will help you begin the process of evaluating alternatives, dismissing fruitless alternatives and focusing your research on suitable alternatives.