After retiring from a lucrative career in the banking and corporate world, Lillian founded World of Feng Shui, a feng shui merchandising and franchising company, where she is the chairman. The franchise has stores in Brunei, Vietnam, Bangkok, Calcutta, Manila, Cebu, Tokyo, Las Vegas, Hawaii, Toronto, London, the Netherlands, Brussels, Madrid, Barcelona, Sydney, Melbourne, five stores in Indonesia and 23 stores in Malaysia. The franchise also has an online store, wofs.com, which claims to be the world’s “first online feng shui magazine”. Lillian is also the publisher of Feng Shui World magazine, a bi-monthly publication.

Lillian founded the Lillian Too Certified Consultants Institute, which runs correspondence courses and certification programs in feng shui. She also has a roadshow called Lillian Too’s Feng Shui Extravaganza which was broadcast on the satellite television channel, Astro.

In 2006, she appeared in advertisements for the Malaysian mobile telephone company Celcom, together with her daughter, Jennifer Too.

In 1997, Too met Tibetan lama Thubten Zopa Rinpoche in Bodhgaya and took refuge with him. She now refers to Lama Zopa as her "precious holy guru," and a subpage of her website is devoted to him. The Buddha Book describes her experience with Tibetan Buddhism in more detail, and recommends various practices promoted by the FPMT, a network of dharma centers co-founded by Lama Zopa. (An appendix of the same book lists worldwide addresses of these centers.) Too is presently (2008) president and centre director of the FPMT's Losang Drakpa Centre in Selangor, Malaysia.

According to thingsasian.com, The Complete Illustrated Guide to Feng Shui holds the record for the highest sales for a color hardcover book, with more than 600,000 copies sold to date. "Her other books have made it to best seller lists in the United States, Singapore and Germany, attracting believers from the previously sceptical Western readers."As the author of over 80 books on feng shui, Lillian can be considered as one of the most prolific writers on the subject. She has been publishing books since 1996.

• The Complete Illustrated Guide to Feng Shui: How to Apply the Secrets of Chinese Wisdom for Health, Wealth and Happiness. Element Books (1996). ISBN 1-85230-902-4.
• Water Feng Shui for Wealth. Konsep Books (1996). ISBN 983-9778-03-X.
• Flying Star Feng Shui. Konsep Books (1996). ISBN 983-9778-72-2.
• Applied Pa-kua and Lo Shu Feng Shui. Konsep Books (1996). ISBN 983-99825-8-3.
• Eight Easy Lessons: Lillian Too's Feng Shui Kit: All You Need to Get Started with Feng Shui (Feng Shui Fundamentals). HarperCollins (1997). ISBN 1-86204-150-4.
• Chinese Astrology for Romance. Konsep Books (1997). ISBN 983-9778-00-5.
• Practical Applications of Feng Shui (Feng Shui Series). Quiller (1998)ISBN 0-9587113-1-3.
• Applied Pa-Kua and Lo Shu Feng Shui: In Collaboration with Feng Shui Master Yap Cheng Hai. Lillian Too & Yap Cheng Hai. Oriental Publications (1998). ISBN 0-9587113-0-5.
• Lillian Too's Easy-To-Use Feng Shui For Love: 168 Ways To Happiness -Enhance Your Relationships Energize Your Friendships, Maximize Your Love Potential. Sterling (2000). ISBN 1-85585-758-8.
• Lillian Too's Practical Feng Shui - Symbols of Good Fortune. (Element Books, 2000). ISBN 1-86204-795-2.
• Lillian Too's Fortune & Feng Shui (insert year and zodiac animal) with Jennifer Too. (Konsep Lagenda SDN BHD (223 855) ISBN 978-983-3263-66-0
• Lillian Too's Practical Feng Shui - Formulas for Success. (Element Books, 2000). ISBN 1-86204-563-1.
• Lillian Too's Little Book of Creating Abundance. Rider & Co (2000). ISBN 0-7126-0065-5.
• Die Grundlagen des Feng Shui. Droemer Knaur (2000). ISBN 3-426-87064-9.
• 128 Easy Tips for Work and Career (Lillian Too's Feng Shui in Small Doses). Oriental Publications (2000). ISBN 983-9778-13-7.
• Creating Abundance with Feng Shui. Wellspring/Ballantine (2000). ISBN 0-345-43743-8.
• Illustrated Encyclopedia of Feng Shui: The Complete Guide to the Art and Practice of Feng Shui (Illustrated Encyclopedia) . Element Books (2001). ISBN 1-86204-589-5.
• Ultimate Healing : The Power of Compassion. Wisdom Publications (2001). ISBN 0-86171-195-5.
• The Complete Illustrated Guide to Feng Shui for Gardeners (Complete Illustrated Guide). Element Books (2002). ISBN 0-00-713324-3.
• Discover Yourself: Understand Your Mind, Know Your Body, Nurture Your Spirit, Realize Your Potential. Hay House (2003). ISBN 1-4019-0152-2.
• The Buddha Book: Buddhas Blessings, Prayers and Rituals to Grant You Love, Wisdom, and Healing. Element Books (2003). ISBN 0-00-711702-7.
• The New I Ching: Discover the Secrets of the Plum Blossom Oracle. Lillian Too & Jane Evans. Hamlyn (2004). ISBN 0-600-60917-0.

Following the success of Lillian Too’s Feng Shui Extravaganza, Lillian began recording a 13-episode series called The Lillian Too Show in 2004. The 30-minute show was broadcast in English with Chinese subtitles. Running for 13 weeks, the series covered everyday concerns from personal wealth accumulation to general improvement in the quality of life, to more specific topics. The series premiered on the satellite channel, Astro AEC, on September 15, 2004, with repeats on Astro@15. The first series was also released for distribution on DVD format. In 2006, the new series were aired on Astro Prima and the new season also features Lillian's daughter, Jennifer Too.