Assalam alaykum,
As you are aware, Tauheed....(the Knowledge and belief in the Oneness of Allah, as the Creator/Sustainer of the Universe/our Lord....) is one of the 5 pillars upon which Islam is built, the other 4 being:---Five daily prayers, Zakkat, Fasting during the month of Ramadan and the Hajj. Tauheed also involves our believing that Allah Subhanahu Wa Ta'ala has Pure Names and Attributes that transcend anything we can imagine, and that He is the Only One worthy of worship. We worship Him in the way and manner shown/taught to us by His Messengers whom He sent to Mankind over the ages, the last of whom was/is Prophet Muhammad, may Allah bless him and grant him peace.
For our Tauheed to be sound and meaningful, we must mind the following, namely:---
1. To always speak the Truth.
2. To keep obligations in accordance with the Holy Qur'an and the Sunnah.
3. To keep the heart free from hatred.
4. To avoid forbidden food.
5. To shun innovations in religion, and
6. To be satisfied with Allah Most High in scarcity and plenty, and turn to Him in happiness or affliction.