All EFTers were newbies once. And this is where one can pass on wisdom

To tap on something general instead of specific, for example “Lack of confidence” instead of “When everyone looked at me in yesterday’s meeting and I felt nervous”.
To spend good time trying to find the exact emotion to tap on instead of just tapping on whatever is there. For example, getting all worked up whether the emotion is shame or fear of rejection when all that is needed to tap on is “When everyone looked at me in yesterday’s meeting”.
Tapping one or two rounds, not getting very far and promptly giving up. A session can have dozens of rounds of tapping; a feeling is rarely released in one or two rounds.
Assuming that the EFT is not working fast enough because of an energy toxin and giving up. This is common with new EFT practitioners with minimal training. Of course, energy toxins do occur and they do stop EFT progress. However, they are rare; maybe about 1% of clients will have an energy toxin. Chances are that an emotional root cause is blocking progress instead.
Panicking when intensity of negative feeling increases and stopping the tapping, thinking the EFT has made things worse. In fact, this happens because the issue on the surface is diminishing and thereby exposing a bigger issue underneath.
Expecting all issues to be resolved within a few sessions at most. EFT, when expertly applied, releases emotional issues far more quickly than any other method I know. However, some issues require years rather than minutes. However, two years of EFT compared to a lifetime of psychotherapy and medication seems a pretty good deal to me.
Expecting nerve tissue, DNA, and mis-shapen bones (to give just a few examples) to restructure to be as good as new and totally normal or healthy with EFT. I think this is assumption is because EFT does seem to be a miracle cure in many ways. However, it is not a cure, rather a way to help the body achieve optimal possible health.
Expecting EFT to be a mind-control method instead of a holistic energy balancing method. To give an example, an anorexic who has not eaten for a day will become hungrier when tapping to release food cravings.
Being afraid of using the negative statements in EFT, mistaking them for negative affirmations. In fact, the negative statements in EFT are not affirmations and have a completely different role to an affirmation.
Cramming as many emotions in one round of EFT as possible in the hope of a faster result. For example, tapping “fear” on one point, “terror” on the next, “shame” on the next, then “anger”, “guilt”, etc. This overwhelms the person, who then feels worse and may give up altogether on tapping.
Trying to force the result, for example someone with a fear of mice trying to handle a mouse when the intensity of feeling reduces but is not yet gone.
Lastly, and in a similar vein to above, tapping on a memory till it feels manageable rather than continuing till it is a zero. This means that if you have tapped for confidence in public speaking say, and got it down to a 5, then next time you get up to speak, your starting point is a 5 rather than a zero. If anything spikes your mood by say, 4 points, had you started at 0, this would be still manageable. It makes sense to get as much of it as possible.

to new tappers, so newcomers can learn from the mistakes of those who have already been there. So without further ado, here are the dozen biggest EFT newbie mistakes, from someone who has been there (and already tapped for the cringe-worthy memories)…