By far, the most common and possibly the best way to take CBD oil is to take your preferred serving under the tongue. This is called sublingual consumption, and you hold the oil under your tongue for 60 to 90 seconds before swallowing. Sublingual consumption allows the CBD to absorb directly into the bloodstream, so your body doesn’t have to metabolize it through multiple systems before experiencing its effects. 

https://youtu.be/ov8VRH-UIik

The link above is a video by the wellness Dr. he explains how to find the right dosage for you and also how consistency is key to CBD's effectiveness