I too have been plagued with intrusive thoughts for a very long time and its probably been one of my most crippling sagas associated with my mental health concerns...Unfortunately out of all the years ive been havin therapy/counselling/support group/ hospital/ and meds nothin has yet isolated this problem with my existing mental health issues....But may i add that perhaps it may be an isolated case to me that nothin has worked,Yet to this one individual (being me).Its basically hindered me from a lot of forward momentum since i was first diagnosed with ocd and the intrusive thoughts have just been that extra baggage i really didnt want...However ive tried techniques to deal with it but i generally would leave a place or an an environmment at a drop of a hat unceremoniously when intrusive thoughts came on and walk it off taking deep breaths and would generally go away and do some menial task like cleaning tile grout off a bathroom wall with a tooth brush to desensitize thought(s)..Bizarre but zen!!!!!!!!!!!! all mindfullness...Please dont despair as im sure there must be approches and alternative ways to deal with this issue, and im confident youre on the right path being on this site for starters with a smorgasboard of opinions and techniques from so many wonderful souls to alleviate this burden youre comfronted with....Please take care and hope you find some comfort and resolution with any of youre concerns!!!! Best wishes.