things to do before taking your life

I am a 19 year old and I want to take my own life. I have been considering it for a while now, and I'm at a point where I don't have a time or a place or even a method in mind, but I know that I am going to do it.
I just wanted to ask for things I have to do/ should do before going through with it, be it write some letters or clear my financial accounts.
Please let me know if you know of anything that has to be done before killing yourself in order for my family to not get into trouble/ have any problems with stuff I didn't do after I'm gone.
Thanks in advance guys