Verses (Sloka) from holy Hindu texts like the Vedas, Upanishads, Bhagavad-Gita, Mahabharata , Ramayana, Durga Saptashati or Chandi are considered powerful enough to be repeated to great effect, and therefore have attained the status of a mantra. As per the Vedic practices, most ancient techniques and classical Hinduism, mantra is symbolized as a requisite for spiritual advancement and high attainment.

Ganesh Sloka:
Lord Ganesha is the one of the most popular gods of the Hindu Religion. Ganesh is known as the eradicator of obstacles and god of beginnings. Lord Ganesha is considered as the first god to be worshipped. Slokas on Lord Ganesha form the part of prayers offered to the lord. Here is a collection of Ganesha Shlokas:

"Shuklaambara Dharam Vishnum, Shashi Varnam Chatur Bhujam
Prasanna Vadanam Dhyaayet, Sarva Vighna Upashaanthaye"

Meaning: Lord Ganesha always dressed in white represents purity. He is omnipresent with gray complexion like that of ash glowing with spiritual splendor. The Lord with bright countenance has four arms. I meditate on the God who can destroy all obstacles whether material or spiritual.

Vishnu Sloka:
Lord Vishnu is considered as the chief god in Hindu religion and Indian mythology. Vishnu, the preserver, forms the part of trinity gods. Vishnu Slokas form the part of prayers offered to the lord. Vishnu Slokas/ Shlokas are as follows:

"Kaayena Vaachaa Manasendriyairvaa
Buddhyaatmanaa Vaa Prakriteh Svabhaavaatah
Karomi Yadhyadh Sakalam Parasmai
Naaraayanaayeti Samarpayaami"

Meaning: The literal meaning of the mantra is: "I offer everything to Lord Vishnu (Narayana); whatever I do with my body, words, mind, limbs, intellect or my inner self whether intentionally or unintentionally. I bow to the great lord, Vishnu".

Early Morning Sloka:
Early Morning is considered as the best time to worship God. Early morning is also known as "Brahma Mahurat" in the Hindu Mythology. It is regarded that prayers made at this time reach directly to the God. Early Morning Shloka (Sloka) is given here which also serves as the first prayer of the day to the almighty.

Karaagre Vasate Lakshmi Karamadhye Sarasvati,
Karamuule Tu Govinda Prabhaate Karadarshanam,
Samudravasane Devi Parvatastanamandale,
Vishhnupatni Namastubhyam Paadasparsham Kshamasva Me

Meaning: The front part of the hands (the finger tips) is credited to Goddess Lakshmi, the Goddess of wealth. The middle part or palm is credited to Goddess Saraswati, the Goddess of learning and the root (the part of hand near the wrist) to Govinda. So, every morning, one should have a reverent look at one's hand which represents sincere labor.

Sloka While Eating:
Eating is an important activity, which is required in order to live. It is God, who has created each and every thing. Food, hunger, living beings, all of them form the part of God's creation. One should remember God, the omnipresent, who has given both, sweet and sour delicacies to satisfy our taste-buds. Following is the Sloka/ Shloka which can be recited while eating or taking your food.

"Brahmaarpanam Brahma Havih Brahmaagnau Brahmana Hutam,
Brahmaiva Tena Gantavyam Brahmakarmasamaadhina"

Meaning: The accurate meaning of this mantra is: "A practice of offering is Brahman, the oblation is Brahman, the device of offering is Brahman, and the fire (hunger) to which the offering is made, is also Brahman. For such a one, who abides in everything (Brahman), by him alone Brahman is reached".

Sloka For Lighting Lamp:
Light is considered as a symbol of auspiciousness, prosperity and abundance in the Hindu religion. Light brings brightness with it and removes the darkness. Light makes it possible to see things clearly. Following Sloka / Shloka can be recited while lighting the lamp. This prayer is also known ''deepa shlokam''.

"Subham Karoti Kalyanam
Arogyam Dhana Sampadah
Shatru Buddhi Vinashaya
Dipa Jyotir Namostute

Meaning: The accurate meaning of the mantra is: "I fold my hands before the light that brings prosperity, auspiciousness, good health, abundance of wealth and destruction of the enemy's intellect". Here, Darkness symbolizes enemy's intellect and with the arrival of light, darkness disappears. Likewise, light (God's Grace) destroys darkness (enemy's intellect).

Bedtime Sloka:
Bedtime is the time when people want to relax themselves after the long hectic schedules of the day. It is considerable to remember God at such time. Following Bedtime Sloka / Shloka is a bedtime prayer of the Hindus.

"Karacharana Krn Itam Vaakkaayajam Karmajam Vaa,
Shravananayanajam Vaa Maanasam Vaaparaadham,
Vihitamavihitam Vaa Sarvametatkshamasva,
Jaya Jaya Karunaabdhe Shriimahaadeva Shambho"

Meaning: The literal meaning of the mantra is: "O God, kindly pardon my incorrect actions done consciously or unconsciously, either through my organs of action (hand, feet, and speech) or through my organs of perception (eyes, ears) or by my mind. I adore the God, who is the ocean of kindness".

Source: Swamiparamananda