I second the sharpen prompt, and the UX design course with Google. Or https://designercize.com/ will give you random prompts to work on. Source: over 1 year ago

For basic topics you can look at CollectUI's subjects and pick some that interest you. For more advanced subjects I can recommend Designercize. Source: about 2 years ago

Actually just stumbled upon https://designercize.com/ myself today and did a few prompts with my boss. The randomness helped push me to think outside the box and find more reasonable (albeit absurd) solutions. Source: about 2 years ago

I need to practice my whiteboard challenge skills. Anyone wants to do this with me? We can get prompts from these places: https://designercize.com/ or https://sharpen.design/ and come up with things on zoom. Source: over 2 years ago

Designercize.com, if you look to solve whiteboarding challenges that might be happen as part of hiring interview process. Source: over 2 years ago

Avo — Simplified analytics release workflow. Single-source-of-truth tracking plan, type safe analytics tracking library, in-app debuggers, data observability to catch all data issues before you release. Free for 2 workspace members and 1 hour data observability lookback. - Source: dev.to / almost 3 years ago