That person could be sure to follow your child through their teens, being a special friend to talk to about adolescence, hormones, puberty, choosing friends, dealing with dating, picking a major for college, why not to do drugs or have pre-marital sex, etc. Write your thoughts and feelings down in a journal for your child to read someday. Include family history, your feelings of love for your child and family, advice on anything such as religion, nutrition, sex and dating, being responsible, getting along with others, etc. I have included some Dear Abby columns that I liked. Take care to not sound too sad or depressed.
Some women make a video or audio tape for their children.
Keep your photo album up to date. While some like those fancy scrapbook kits that artfully capture family life and times, there are simple albums that have a margin to write in on the side of the page. Of course, keep your will up to date and be sure to appoint a guardian for your child. Think about whether you want your child's guardian to also control the trust money or if you would prefer someone more financially knowledgeable or trustworthy. It is better to name a trust as a beneficiary rather than a child.