Without going into the specifics of just what that is, as its been rehashed all over the interwebs, this post is to serve as a brief how-to....that is all. You, as with all magical work, assume all risk, liability, etc., as connecting with one's Self isn't exactly an easy path. It will shake things up - if it doesn't, you've done something wrong.
The sigil you see below is a key of sorts. Its purpose is simply to rend the veil such that you have the ability to connect with and perceive your Self as a separate entity so that you can work with it. You will need to have a basic understanding of sigil magic, astral projection, creating sacred space, etc. to use it effectively and safely.
I would recommend drawing it on a piece of cloth using your own blood, or perhaps a scrying mirror. The former method will allow you to reuse it as you see fit.
This will likely stir strong emotions and desires in you, so be prepared and don't undertake this if you're troubled, unwilling to do the work, given to bouts of megalomania, or any other such sociopsychological malady. Be aware that this working will attract attenton from spirits, so you may have spirity nasties show up and try to siphon your energies after the fact, so diligence is required. This isn't something that you do out of curiosity and then give up on, so bear that in mind.