To look up dirty hockey tactics, you already know that !g and !b search Google and Bing, respectively. But what you may not know is that !gi and !bi search Google Images and Bing Images.
Syntax: !gi keyword(s) | keyword(s) !bi
Examples: snow shower hockey !gi | !bi face wash hockey
Protip: Bangs can be appended to the front or at the end of your search query. Both ways work.
Use bangs in your browser’s address bar by making DuckDuckGo your default search engine. Here’s how to switch in Chrome. For Firefox, install the plugin.