Hiya,
Will keep my response pretty brief because I think Jacob and Naomi have covered most of it - especially agree with Naomi on building keeping up with CA into your routine + choosing certain industries you're interested in to keep up with in particular.
I just wanted to add some advice I've repeated quite a few times now on the forum which is that you should always look at your application first when it comes to thinking about what kind of commercial awareness questions might come up. I've done a lot of things in relation to the automobile industry in terms of work experience so I always get asked about what's happening in that industry. I also work part time in retail and one of the most recent questions I got asked was about the retail industry. If you've mentioned a deal or something, really look into that deal, what industry the deal involved what jurisdiction it involved and read into articles to do with those things. When I was at my first vac I did a lot of work on LIBOR and that always came up without fail at every interview, not because it is something partners expect everyone to know about but because I actively mentioned it in my work experience section. Partners generally don't try to catch you out by asking something completely out of the blue and in my experience they tend to stick to things you've mentioned in your app and use that as a way to test your CA. So while the resources both Jacob and Naomi have mentioned are excellent ways to develop the commercial awareness mindset and keep up with wider issues generally, there is a high chance that if you have already directed the partners in a certain direction with your application itself, they will stick to those topics. I'm aware this can be slightly unconventional advice but it's advice I'm giving because without fail the questions I encountered in all four interviews this app cycle were all based on things I had mentioned in my app.
My own favourite resources: FT Daily News Briefing podcast, TCLA's Commercial Newsletter, Bright Network's Commercial Round-up.
Here's some previous threads in the forum with some additional recommendations:
Podcasts -
https://www.thecorporatelawacademy....ial-awareness-podcast-thread.2182/#post-34835
Apps -
https://www.thecorporatelawacademy....-business-commercial-law-app.2604/#post-36552
Blogs -
https://www.thecorporatelawacademy....gs-resources-are-you-reading.2553/#post-34794
Hope that helps!