Question: what are good vocal warm ups?
Answer: Yawn-sigh Technique. For this quick vocal exercise, simply yawn (take in air) with your mouth closed. ... 
Humming warm-upS. ... 
Vocal Straw Exercise. ... 
Lip buzz Vocal warm-up. ... 
Tongue trill exercise. ... 
Jaw Loosening ExerciseS. ... 
Two-octave pitch glide Warm-Up. ... 
Vocal Sirens Exercise.