I looked into it a while back, saw a technique where every time you look at your watch to check the time (has to be a digital watch) look 2 or 3 times to check. Apparently machinery often doesn’t work in dreams (as expected), and so a digital watch shows a different time if you look at it two or three times. If you get used to doing that whilst your awake you may remember to do it whilst you sleep.
I did it for a few weeks, then one day it almost worked, but I just ended up waking up 
There were other ideas there as well, which apparently have been quite successful. The page said its quite common for people to wake up, but apparently if you start spinning in the dream then your less likely to 
seemed like a lot of effort to me. I can’t remember where I found this but it was through a google search so it can’t be hard to find.
Also, I’m far from an expert, but psychological disorders? Seems quite far fetched. Its not like something you can do on a daily bases, to the point where problems may arise. From what I’ve read it takes people sometimes months, if not years to achieve a single full lucid dream, and they have said it was one of the most amazing experiences of their lives.
But I don’t know much, so your probably better off listening to the other guys 
