Add documentation on servicification recipes

services/README.md

 # Chrome Foundation Services
 
 [TOC]
 
 ## Overview
 
 This directory contains Chrome Foundation Services. If you think of Chrome as a
 "portable OS," Chrome Foundation Services can be thought of as that OS'
 foundational "system services" layer.
 
@@ skipping 28 matching lines @@
 Note that while it may be possible to build a discrete physical package (DSO)
 for each service, products consuming these services may package them
 differently, e.g. by combining them into a single package.
 
 ## Additional Documentation
 
 [High-level Design Doc](https://docs.google.com/document/d/15I7sQyQo6zsqXVNAlVd520tdGaS8FCicZHrN0yRu-oU)
 
 [Servicification Homepage](https://sites.google.com/a/chromium.org/dev/servicification)
 
+[Servicification Strategies](docs/servicification.md)
+
 ## Relationship To Other Top-Level Directories
 
 Services can be thought of as integrators of library code from across the
 Chromium repository, most commonly `//base` and `//mojo` (obviously) but for
 each service also `//components`, `//ui`, *etc.* in accordance with the
 functionality they provide.
 
 Not everything in `//components` is automatically a service in its own right.
 Think of `//components` as sort of like a `//lib`. Individual `//components` can
 define, implement and use Mojom interfaces, but only `//services` have unique
 identities with the Service Manager and so only `//services` make it possible
 for Mojom interfaces to be acquired.
 
 ## Adding a new service
 
 See the [Service Manager documentation](/services/service_manager) for more
 details regarding how to define a service and expose or consume interfaces to
 and from other services.
 
 Please start a thread on [services-dev@chromium.org](https://groups.google.com/a/chromium.org/forum/#!forum/services-dev)
 if you want to introduce a new service.
+
+If you are servicifying existing Chromium code: Please first read the
+[servicification strategies documentation](docs/servicification.md), which
+contains information that will hopefully make your task easier.