Vocal fatigue can occur when you overuse your voice or sing with improper technique. To avoid vocal fatigue, start by practicing good vocal hygiene, such as staying hydrated, avoiding alcohol and smoking, and getting enough rest. Warm up your voice before practicing and take breaks when needed to avoid vocal strain. Additionally, practice good vocal techniques singing lessons, such as proper breath control, support, and resonance. Avoid pushing your voice beyond its limits and practice in a comfortable range. Finally, work with a vocal coach who can provide feedback on proper technique and help you develop a healthy and sustainable vocal practice.