articles: 
read articles * 100
write an article after studying many articles about NLP, or others ...

Above: It's too less in some domains.

YouTube: make videos and earn

Finish a HUGE Manim project.

Codeforces: learn algorithms and earn points on Codeforces
solve problems and prepare for ICPC

solve DP problems in Leetcode.

osu: practice high speed maps

preview CS course for next semester
learn CSdiy for interesting and useful courses