Light a lamp (diya) around the corner on the night of Diwali.
Light a diya in the temple as well.
It is a must to place diyas at the front door and/or the main gate.
Let the diya in your home burn till the morning of the next day.
It is considered auspicious to light diyas under bael trees on Diwali.

Ghee or oil in a diya signifies negativity in your mind and the wick symbolises the Atma or soul. By lighting the diya, you dispel negativity from your mind and soul. This clears up space for positive thoughts to enter.

Lighting Diwali diyas signifies the victory of good over evil. Generally, we celebrate Diwali on Amavasya or the no moon night. Lit diyas help to dispel the darkness of this night and radiate light. 

Goddess Lakshmi only enters well-lit homes. Thus, begin lighting diyas after the Lakshmi puja to welcome her into your home.
Keep the diyas lit throughout the night to ensure that darkness and negative spirits do not enter your home. 

Light the first diya in your pooja room. Vastu associates the tulsi plant with Goddess Lakshmi. 
If you have a tulsi or holy basil plant, place diyas near it. If you do not own a tulsi plant, place diyas in your kitchen.
Welcome wealth into your life, keep diyas facing north or northeast.
To improve your health, position diyas facing east.
Diyas kept near water containers can banish negativity, protect against diseases and increase wealth.

Use brass or mud diyas to attract positive vibes into your home and dispel negativity.
Metals like brass are good conductors of positive energy.
Mud is a good reservoir of good spirits.
Using brass and mud diyas creates a happy and contented aura in the house.

Use ghee in diyas as it contains stronger divine particles than oil.
Ghee diyas emit sattvik or divine frequencies, filling your home with happiness.
Only use ghee prepared from cow’s milk.
While you can also use mustard oil, avoid using sunflower oil.

It is always better to use straight wicks instead of puffed wicks.
Straight wicks attract superior deities while puffed wicks attract inferior ones.
The straight wick signifies the absolute fire element. 
This heralds positivity and happiness in the mind of the worshipper.

How to light Akhand Diya?
Burning of the Akhand diya holds special significance on Diwali. Diyas that remain lit throughout the night keep evil forces away from your home on the moonless night of Diwali. In addition, a diya that is lit all night is meant to show light and welcome in Lakshmi and Ganesha. 

Keep filling the Akhand diya with ghee (or oil) at regular intervals.
Keep the diya covered at all times. You can use a glass cover.
If the wick goes off, do not reburn it. Place a new wick beside the old one.

Don'ts for Diwali Puja

When choosing gifts for friends and relatives, don't choose leather items, cutlery and crackers.
Gambling should be avoided.
Avoid Drinking and taking non-vegetarian food on Diwali.
Don't leave the pooja area unattended throughout the night to make sure that the diya remains lit.
Do not use too many candles.

दीपोत्सव आपके जीवन को सुख, समृद्धि, एश्वर्य और शांति प्रदान करे, आप विश्व सद्भाव और शाश्वत सुख के प्रकाश से प्रकाशित हो।

आपको और आपके पूरे परिवार को पंच दिवसीय दीपोत्सव पर्व  की हार्दिक हार्दिक शुभकामनाएं।