A quick tutorial by Aaron Marino of alpha m. is presented in this video. Supplies needed are a fine tooth comb and a pair of scissors.
He covers where the eyebrows start to balance your face. Then he demonstrates grooming his eyebrows with the scissors and nose hair trimmer. He also reveals a trick to grooming the eyebrows by going downward. Shape up the outer edges after grooming. Five minutes of trimming and thinning of eyebrows is essential for bushy eyebrows.