If you're just starting out, focus on what solves the most problems with the fewest pieces. A basic set of needlework accessories includes reliable measuring tools, visible markers, and finishing tools; add simple containers to keep everything handy. With these knitting tools, you can cast on, measure, and bind off without interrupting your session. The goal is not to accumulate, but to cover 80% of your tasks with the 20% of items you use most often on a daily basis.
As you progress, incorporate needlework tools specific to your way of working (blocking, tension control, tip protection) and expand your set with accessories that provide comfort, precision and speed. Add markers, gauges, tip protectors, counters, trays and small organisers: with each addition, your system will become more complete, functional and easy to use, perfect for learning and enjoying knitting at home, in class or when travelling.