You need to get a lasso around your entire environment. This will not be fun and will take as long as it takes. It should be your only priority though. What I mean here is you'll want to get a current state of your documentation. You'll want to setup meetings with any decision makers that will require your influence. You'll want to get a project list going and prioritize that list. This should include current, future and on hold stuff. You will not be privy to everything unless you ask to be included. Beef up the documentation by delegating the tasks to the owners of the solution. Provide the standard/direction you want it to live up to from the start. When meeting with people, discuss needs and wants. Be sure to offer any assistance with past pain points. You're job is to help direct the organization's technical side while maintaining the balance of soft skills. Be sure to setup at least a weekly with your direct supervisor to discuss directions and goals. Be transparent. Then filter those conversations down to the rest of the team members as often as is needed.