When we attend sessions for EFT, we may worry about getting waylaid into issues that we do not feel are the relevant ones to work on next.
Of course, it is important that you are the driving force behind your own sessions and that you feel totally comfortable with that.
It is also useful to consider the following factors.

• Often someone on the outside of us sees the whole picture whereas we only see part of it, and so I may think it important to go where you do not think is relevant.
  
• After working on an issue, there might be the Apex effect.
  This is when we completely forget we had a problem with that issue, because it has healed so well.
  The Apex effect happened with a client who on her next session, complained that I wasted the whole of the previous session on something that she had never had a problem with, and could we please concentrate on something relevant this time.
  So I brought out the previous session´s records for her to see, and she was totally shocked to remember that yes, she did use to have an issue there.
  She looked totally confused about it until I reassured her that there is something called the Apex effect and explained it to her.
  She then said she understood and was happy with the previous session.
  
• When there are a number of aspects and manifestations to heal, then the way to healing is through many doors.
  Each door opens up into a room where there is stuff to take out and heal.
  When finished in one room, we feel lighter and then move onto another door.
  When there are many doors to choose from, there will be many equally important doors.
  And so opening one of those doors instead of another is inevitable, since we cannot open all the doors at once.
  There are also times when the practitioner goes through an appropriate and advisable door but this is too overwhelming for the client and just not suitable.
  It is best on this occasion for the client to immediately tell the practitioner that it is the wrong door, and for the practitioner to respect that.
  
• Some clients have been indoctrinated by previous therapy or study into believing certain issues are important and others do not count.
  For example, I had worked on a client´s perceived root issues in childhood to no avail only to find that the real trauma had happened just a few years previously; and when we worked on this, the client finally started feeling better.
  I have also worked with clients that have been traumatised, bullied, and made to feel bad about themselves by talk therapists and psychologists.
  Sometimes this happened when the client was a child, because the child had been acting out due to parental abuse, or because the child was possibly autistic or had ADHD but not diagnosed as such.
  This child would grow up believing all the bad things about themselves but not allowing me as a practitioner to go to those psychologist events, as they were not ready to change that belief as yet; it had become part of their identity.
  

Having said that, there are times when a really urgent issue pops into a client´s head for healing, and if they wait for the practitioner to finish what we are tapping on first, they may then get distracted and forget that issue, which comes up a bit too late after the session.
Should that happen, it is good to interrupt and say that something popped into your head, and explain what it is.
Then the practitioner may go there straight away or may lead onto it.
Often, I would go there almost straight away and then come back later to where we were before.
The reason why I would come back is that sometimes EFT is like opening a dusty old box full of smelly old stuff.
Once we open the box, the smell comes out, and so it is good to get rid of the smell in that session for that particular box.
What is called daisy-chaining is a common occurrence in EFT, where the event we are working on leads to another, possible more core one, and this is a beautiful way of unravelling an issue through events and aspects as they come to you.
On some rare occasions, this issue that pops into the client´s head many not be helpful.
An extreme example of this is clients who engage in an addictive or compulsive behavior during the session, be it smoking, eating, text-messaging or emailing an ex they were compulsively holding onto, gambling, or even speaking to an ex they were compulsively communicating with - all during the session instead of tapping.
This may seem like the client taking control of issues by partaking in an activity they want to engage in, but to do so instead of tapping is the client losing control, and the practitioner´s job is to help the client regain control of their life.
In this extreme case, I always recommend that the client visit their doctor for help with medication, in order to be able to sit through a session and work on the relevant issues without the need to continually partake in the destructive behavior instead.
In conclusion, there are a number of factors that influence where in the treatment is the ideal place to go, and it often just is not at all clear-cut.
Somewhere in-between a client letting their issues to take complete control and a practitioner taking complete control is a happy medium where the session should be.
And we are all human; it is not always possible to get it right 100% of the time.
Given enough sessions, and commitment from both the client and practitioner, the most complex issue can be resolved with EFT.