Please sit in the morning to perform havan. Havan must be in sunlight then it is more beneficial. Then half a bowl of fresh water with a tablespoon must be with you with small twigs specially of mango tree if possible. Havan samagri, ghee, camphor and match box must be there with you. Please sit on such asan on four time folded blanket and blanket must be on mat. Sukh asan i.e., sit on duly folded feet in comfortable position. Then first close your eyes and concentrate between two eyebrows and chant Gaytri mantra three times within heart and not by mouth. Then open your eyes. Take one spoon of water in right palm. Chant this mantra, OM AMRTIO UPASTRANMASI WAHA and drink the water put in your palm. Then again take the spoon of water in right palm then chant the next mantra, OM AMRITA APIDHANMASI SWAHA, AND DRINK THE WATER. THEN AGAIN TAKE THE water in right palm and chant the mantra, OM SATYAM YASHAH SHRI MAYI SHRI SHRAYTAAM SWAHA, AND drink the water. Then wash the right palm while sitting, with the same water kept in bowl. Then put the twigs into havan kund with one piece of camphor and burn it. During this process chant the Gaytri mantra again and again till such time the fire is lighted sufficiently. Then chant the Gaytri mantra and at the last add the word Swaha and offer ghee with tablespoon, quantity equivalent to 4 to 5 drops. And if you are alone then also offer in fire pinch of havan samagri from your right hand's finger and thumb avoiding forefinger. So this offering may be of 11 times, 21 times or 51 times as the time suits. The havan with Ved mantras are always offered as the best worship of God only please. Do havan daily and both times.