Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. 2 Corinthians 5:17
We must be consistently and consciously aware that he is always seeking to destroy us; to take our focus off of God.
God warned Israel to avoid every type of Satanic influence:
When thou art come into the land which the Lord thy God giveth thee, thou shalt not learn to do after the abominations of those nations. There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch. Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer. For all that do these things are an abomination unto the Lord: and because of these abominations the Lord thy God doth drive them out from before thee. Thou shalt be perfect with the Lord thy God. For these nations, which thou shalt possess, hearkened unto observers of times, and unto diviners: but as for thee, the Lord thy God hath not suffered thee so to do. Deuteronomy 18:9-14
Israel was to have no contact with the work of Satan in any form.
God's organization, the true church, is more powerful than that of Satan:
Behold, I give unto you power to tread on serpents and scorpions, and over all the power of the enemy: and nothing shall by any means hurt you. Luke 10:19
This includes spiritual wickedness in high places. Satan and his hosts challenge God's power, but they certainly are not a threat to Him or His people. The Church is actually to demonstrate God's power to these evil principalities and powers!
If you understand the principles of God's power, you will not be deceived by the counterfeit works of Satan.
Learn to rely on Jesus in every aspect of your life. This can only come through application experience and knowledge of God's word.