I have my own approach to this problem that's served me well over the years. The basic formula is : Pick your cliche, and Ban it.
there's a balance at play hear, because repitition in music is one of the things that can objectively make it sound great. The human mind likes when it can pick out a pattern, and the balancing act is to make your phrases souand familiar to each other while continually developing them. The reason I say is just so you're cautious not to over-randomise your playing.
1. Write down every over used technique you're doing.
This can be anything from a scale position you rely on, A key you always play in, a scale you always use, always ending phrases on a perticular degree/note like the Root. Always bending, always using a set pattern or rhythm. You get the idea
2. Pick one BAN IT from your playing for a set amount of time.
I compose, and had a bad habit of always composing in C Major because it has no sharps/flats to worry about, so I banned it for a month and as a result. Once that was done I found G and F were getting really easy, so I cut them out too until I became comfortable in more keys.
If this is too easy, and you're just relying on another crutch, ban that one too. The idea here is to get comfortable with new tricks, so that your old ones aren't alone.
3. Pick, or engineer situations where you had to use the original technique. And find alternative ways to solve the problem.
Let's assume that your over used technique is the minor pentatonic scale. Here you take a minor chord progression that lends itself to minor pentatonic, and start using some other scales. Perhaps Dorian, Harmonic Minor, Natural Minor etc.
4. After the Ban on the old technique is over, go back to the situation you used in step 3
First, just have a play around with the situation, see what technique you drift towards, and notice how you now have a choice of at least 2 different approaches to what you're playing over. try focusing on the old technique, then the new, then do some switching or combination work. You'll find that because you HAD to find another way to play, it now comes naturally not to rely on the original crutch.
Hope that helps, I am aware at how messy my language was there!