* Things work slowly, so relax. There are many people that have a hand in every aspect of a product decision.
* At a startup you are actively changing the world. That’s done now. Put that completely out of your head. You are cog in a machine. Instead focus on your assigned product, help your teammates, and just learn to relax.
* You, the individual, are not important. The product is important, the department that delivers the product is less important, the teams that comprise the department are less important than that, and so on. Again, accept the reality and just relax.
* Do your best. Unlike at a startup, generally you will have time to get things correct. This is the difference between competence and others who struggle to get things right and always appear to be in a hurry. There is no reason to be in a hurry.
* Expect insufficient test automation, lots of regression, and plenty of repetition. Also expect everybody to be an expert that is in a hurry and things in a unique way. Just be patient, politely nod, and just relax.
* If you are good at systems automation then learn to automate away as much of your job as you can. Use the now increased free time to contribute to documentation and internal knowledge repositories. You will find that a lot of the documentation can be automated as well.
* My employer has something like 270,000 employees so it’s forgiven if you have no idea what all of those people in your cubicle farm do. You need to actively spend at least 2 days a month answering those questions.
* Just because you are at a big company does not mean you are safe. I have been in a large established super well known .com that failed. People get laid off even when big companies are healthy.
* If you don’t like being bored and are highly risk adverse you might find the big company life highly depressing. A lot of my advice here is to just relax, but I hate relaxing.