There are some areas where having seen it all before is an advantage, particularly with tools and migrations. Everyone experiences most of the same pain points migrating from PHP 5.3 to 5.4 for example, and I have already encountered and solved most of those problems (and I have the scars to prove it). Let me "lend a hand" with your migration process to iron out the tricky bits more quickly and let your team get on with the important stuff.
The same is true of tools; they are very hard to implement from scratch in a team that hasn't used them. Allow me to work with your developers to set up the tools they need, and support them in identifying and documenting how they introduce these changes, workshop-style. Every environment is different so there is no "cookie cutter" approach here; but I have the experience to facilitate smooth introduction of best-of-breed tools and practices.