There are some things Mustahab in Halq:
1- Starting Halq from the right front side of the head and saying this prayer:
اللّهُمَّ أعْطِنی بِکُلِّ شَعْرَة نُوراً یَومَ الْقِیامَةِ
2- It is Mustahab to burry the hair of the head in the tent in Mena and it is better to cut a part of beard and mustache (above the lips) and the nail after Halq.