People say that when doing a sigil magic the last stage is to forget the original intent. But as you know the mind is a bitch. It tries to focus more on things we consciously try to stay away from. Any suggestions?

Lots! I published several of them in my second book, Magic Power Language Symbol. But in brief, forgetting isn’t the only way to avoid the central problem, which is obsessing about a problem and not giving the solution time to work. You can, for example, simply distract yourself from your desire. Working really hard on forgetting your sigil is often counter-productive, because — well, don’t think of the elephant. Immediately, you think of an elephant. Similarly, don’t think about your sigil, and you will automatically think about your sigil. The real key is to consider the work a fiat accompli, and just not worry about it. It’s worry that’s the real problem, not remembering.