You need to take credit for everything you do and you need to tell people about it. Stayed very late to work on something urgent (and therefore important)? Send

You need to take credit for everything you do and you need to tell people about it. Stayed very late to work on something urgent (and therefore important)? Send out an email when you leave that you need to leave now but you have achieved this and this. CC in as many people as you think you can get away with, ideally the manager of your manager as well.