You are welcome!
A good mantra that you are already 'conditioned to', otherwise you run the risk of a mental 'tug of crap'.
The mantra need become a 'common thought and feeling within you'. This is accomplished by the conditioning process mentioned above.
This will take at least 10 days or so for each new one.
I have been doing this consciously with 'records' of same for 35 years. I have boxes full of notebooks (with those tick-marks) and helped many people with no prior experience. It works, it is a low tech method no doubt, but in use over 10,000 years I am sure.
Mantra's do not directly 'cure' anything. So you do not actually use them against thoughts or things that bother you. It is simply a 'conditioning' much as we do with dogs.
A smell crosses a dog's nose much as thoughts 'come to us or stir within'. You 'condition' the dog to attend or ignore a smell with a more persistently applied smell. Such as a fresh hotdog or cheese. The mantra is the cheese.