How do I go about creating a barrier around me like Gensokyo's Barrier? Something that keeps those with negative intentions towars me out I mean, and also keeps negative intentions from getting to me so that it protects from curses too. I'm thinking something that doesn't allow these beings to percieve me would be nice, but then I don't know if they would be able to try something indirect.
I think the barrier should be connected to some indestructible concept but I have no idea what kind of concept to chose or how this connection to the concept would be made or how to make the connection/association indestructible itself.

Any ideas?