Hi blinkinbubbles,
That's a good point about being told to "let go" of clients problems without being given any tools to do it.
I personally find the following very useful:
* EFT (Emotional Freedom Techniques) - if I use this in the session with client, in addition to talk therapy, I find that their problems (no matter how difficult or traumatic) do not "stick" to me and I often feel better after the session than before the session. If, however, we talk during the session without using EFT, their "stuff" can stay with me for quite a few hours or even days unless I take some action to let go of it - again, EFT tends to work quicker for me than anything else in this case.
* If for any reason I don't feel 100% before a session starts, I will spend a few minutes preparing, which could include EFT, grounding, centering, having a drink of water or whatever you feel you need at the time.
* Keeping grounded during the session to avoid "merging" with client's emotions and problems - depending on what kind of therapy you do it may or may not be convenient, but as I normally work sitting down, I make sure that both of my feet are firmly on the floor and that I am sitting in a balanced posture in my chair - if I notice my posture changing during the session - e.g. leaning forward too much (which can restrict breathing), or sitting in a lopsided position, I will shift my posture back to a more balanced one. In a grounded, balanced state you are much less likely to pick up client's "stuff".
*Supervision is very important - in some branches of therapy it is seen as a bit of a "luxury" but I feel it is essential to any practising therapist
I am aware some therapists use visualisations of "shields" and other protective symbols in order to shield themselves from client's negativity - I do not find this necessary and, moreover, I feel such defensive measures could potentially interfere with our connection and rapport with the client - but I know that I do need to take responsibility for my own emotional, mental and energetic state before, during and after the session, to avoid "falling into" client's trauma.
Masha