I don`t know about others but I personally use a layered shield to make sure nothing goes wrong and a couple of mental and spirit based traps I learned how to make in case my shields dont hold.
For shields I use:
1st layer) I trained in use of Psiball and its larger counterpart where you form spherical cloud/bubble/shield around yourself to the point I have a fairly passive and somewhat weak form of it active at all times, but its still good for most minor things. Also if needed I can actively either boost it for a short while or simply keep pouring more energy in it too boost it and actively use it if needed(good thing that 99,9% of people will never have a need for that level of active use of this form of shielding, as its somewhat energy inefficient).
2nd layer) Is made out of labyrinth of chambers around my mind/soul so that even if something gets past my 1st shield I will know it and be ready to either close it off and then simply detach the chamber or use one of the traps to kick it out.
3rd layer) Well I guess you cannot actually call this a form of shielding as it`s just how my mind/soul lets use expression "manifests" itself. Its pretty easy to get lost in it and I have more than a few problems of personal nature roaming there so it can also be a bit(read a lot) of forms of bad to whatever gets in. Well unless we are talking about a simple energy backlash than if it gets this deep I can only find a nice little corner to sit down and wait for it to pass so I don`t bother people around me.
As for Traps there are 2 forms I use:
1st form) Can be also called passive traps are basically there to slow down maybe even stop whoever/whatever is trying to penetrate my shields(example would be creating a energy loop in some of the chambers in the 2nd layer of my shields)
2nd form) Are active traps that can be also divided in 2 categories but they all have one thing in common...... they are only good for one shot.
OF COURSE IT MUST BE NOTED that all defenses and traps are only good for MINOR problems(energy backlashes, minor spirits, etc.) and that actual precautions and shields should be applied before any serious or complex work can be done, not to mention that even these somewhat passive shields should be maintained as often as possible.