How can I stop myself from doing something I really want to that's bad?

Ты must insist on to not do that,If that thing is gonna hurt someone ,the feeling guilty is coming to warn Ты that the thing may be not right ,It's like
a battle Ты must Insist on stopping it!!!
I'm not perfect ,but I'm trying!!!!

Well, if Ты can't do it without feeling guilty, it means that it IS wrong или what. I'd say Ты shouldn't think about that thing, do things that Ты like to do and focus on them. Ты may also talk to a friend of yours или somebody that Ты trust, and they could help you.

I don't really know what to say, but I hope it helps. :)