Essentials Of Tawheed.

As you are aware, Tawheed (the knowledge and belief in the Oneness of Allah Subhanahu Wa Ta'ala, the Creator of the Universe) 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. It also involves our believing that Allah Subhanahu Wa Ta'ala has Pure Names and Attributes that transcend anything we can imagine. He, Alone, deserves to be worshiped in the Way and manner His Prophets/Messengers showed/taught us....the Last of these Messengers to have come from Allah Subhanahu Wa Ta'ala was/is Prophet Muhammad, may Allah bless him and grant him peace.
For our Tawheed to be sound...healthy, we must observe/mind the following, namely:--
1.To always speak the Truth.
2. To keep our 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. Note this well.
Best Wishes.