“Success” in the career realm often means “climbing up the ladder” or obtaining a promotion. If you are interested in this, Eric Barker has data-driven advice:
Network. There are wrong ways and “right ways” to do this. The right way is to offer help to those around you at work – and not just to the well-liked people. If you can forge a strong working relationships with everyone, you’ll be more likely to hear about opportunities and therefore, be able to apply for them faster than others.
And, stating the obvious: If you are helpful to others before you need their help (advice, introductions to others, etc.) then you won’t be sleazy. In fact, people will want to help you.
If you aren’t interested in climbing the ladder or playing this game, but you’re kind to everyone regardless of your job, you’ve already reached success.