Prior to performing EFT it is always suggested that you estimate your level of tension towards the topic you are tapping on.
For example: If you were afraid of walking into a darkened room I would ask you on a scale of zero to ten what level of resistance you think you are experiencing. Zero being no resistance and Ten being the highest level of resistance.
The point to remember here is that you don't have to intellectualize it, if you are not sure then simply guess. In almost every case you will be fairly close to the mark, as your inbuilt guidance system will help you.
Looking at another example; you might be afraid of birds, so prior to tapping I would ask you where you might be on the level between zero and ten. If a bird was to land next to you right now how would that make you feel, you might say that as you think about a bird landing next to you, you begin to feel the fear and you estimate it to be at a level of about a nine
After we complete one or two rounds of EFT I would check with you again to see what feelings you experience as you think about the same again, and where you might be on the scale, hopefully you would have come down. It may not have resolved itself fully from a 9 to a zero, but sometimes depending on the topic it might clear all together after a couple of rounds of EFT, just accept whatever it is.
If your level reduced but did not clear to a zero then we might simply perform another round of EFT to see if it clears.
If you perform another round of EFT using the same Setup and Sequence Phrases and this additional round does not clear you any further then a new approach may be necessary. This usually means you need to change the words, or it could be that your problem is in fact related to another problem which may also require attention with EFT.
Over the years I have realized that our minds are good at linking events to other events, so you might have a fear of dogs but you also have intense emotions around an event from your past when you saw someone being bitten by a dog. So tapping on your fear of dogs may not be enough to release you of this fear, you might also need to spend time tapping on the event from your past as they are most likely connected