Pure self-promotion is a naive strategy. Effective promotion of one's own work comes as an expected side effect of other more desirable activities. Sort of like getting good SEO by posting useful content on your company blog.

Rather than focusing on making yourself known, focus on identifying people who need problems solved. Meet with them directly, make sure they know you want to help, make sure they are comfortable with your solutions.

You should also make a point to identify and promote the successes of people you work with. In doing so you'll improve the team culture around you. Some those people will remember you kindly and promote your own stuff for you when appropriate.

Spend a lot of energy on problem solving and professional networking and you'll get there.