Naam and Prayer not only helps us align ourselves on a spiritual path but also bring us spiritual bliss. It enables us deviate our energy from participation in any kind of toxic environment, habits, conflicts, gossips or addictions to doing things that elevate us spiritually and also bring us mental peace, healing and harmony.
Naamsmaran:
Whenever you chant God’s name in spirit whether you say it 12 times, 24 times, or 108 times, say it with absolute love and devotion for God. You can choose your naam for whichever diety you believe in if you don’t have the time to recite all mantras. God is one.
Mantras and Stotras:
For mantras, don’t be conscious of the count 108 times, otherwise you will be more focussed on the count and not the devotion, concentration part of it. For Stotras, you can choose your capacity to build sadhana.
1) Lord Dattaguru: the more powerful way to recite it 
Om Dram Dattatreyay Namah- 108 times.
Dattamala mantra/stotra: 21 to 7 times or atleast once a day.
Om Dram Dattatreyay Namah- 108 times again after Dattamala.
2) Lord Ganesha:
Om Gan Ganapataye Namah- 108 times.
Ganpati Atharvashirsha stotra: once a day
3) Lord Shiva:
Om Namah Shivay- 108 times.
Shiv Swarnamala Stuti or Rudra: once a day.
4) Lord Ram:
Shri Ram Jai Ram Jai Jai Ram- 108 times.
Ramraksha Stotra-once a day.
5) Lord Hanuman:
Om Shri Ramdutaya, Hanumantaya, Mahapranaya, Mahabalaya, Namo
Namah- 108 times.
Hanuman Chalisa Stotra/Bhimrupi Maharudra: thrice/once a day.
6) Lord Krishna:
Om Namo Bhagavate Vasudevaya, Shri Krishnaya, Namo Namah
– 108 times.
7) Lord Swami Samartha:
Shri Swami Samartha Jai Jai Swami Samartha- 108 times.
8) Lord Gajanan Maharaj:
Gan Gan Ganat Bote- 108 times.
9) Goddess Devi:
Om Aim Hrim Klim Chamundaye Vichche- 108 times.
Adimata Stavanam or Mahishasurmardini Stotra- once a day.
Note: Aim for Saraswati (wisdom), Hrim for Lakshmi (wealth), Klim for Kali (strength) and Chamunda for Goddess Durga.
10) Sai Baba:
Anant Koti Brahmand Nayak Rajadhiraj Yogiraj Para Brahma Shri
Sachidanand Sadguru Sainath Maharaj Ki Jai- 11/21/36/54/108 times.
The best way to allocate time slots during the day for naam and prayers is,
1) Universal Prayer- Once/twice or thrice each day.
2) Mantras together 108 times each as per your sadhana capacity.
3) Stotras together- once or thrice each day.