Here are some estate planning links. Married or unmarried, kids or not, these documents make life a lot simpler in the case of disability or death.
DISCLAIMER: I am not a lawyer, but I do know how to find stuff on the Internet.
I went through retirement and estate planning with a fee-only CFP firm, prior to my husband's passing, in my early 40s. Neither of us knew at the time how critical that exercise would become. Not being grim, but sh*t happens and that preparation saved me a lot of problems.
A simple checklist...
12 Simple Steps to an Estate Plan | Nolo.com
A good reference book to go with that list...
Plan Your Estate - Legal Estate Planning Book - Nolo
Here's a great page on the American Bar Association website that has oodles of links. Scroll down past the webinar announcement.
Estate Planning FAQs | Section of Real Property, Trust and Estate Law
That should keep you all busy for a while.