Your lawyer, accountant and funeral director can help you plan for your & your family's future. If you don't have any of these, that's OK. There are many websites out there to help you figure out what you can and should do to prepare for your death. The most prominent website is the rather crassly (but aptly) named, http://getyourshittogether.org. Created by a young woman who lost her husband in an accident, only to discover that they weren't prepared at all. She spent 3 years straightening out their financial life after the passing of her husband and decided to do her best to help other people to not fall into that same trap. Take a look at the Get Your Shit Together! checklist http://getyourshittogether.org/
Seven Ponds (http://www.sevenponds.com) has extensive materials for both planning before death as well as a step by step guide for what to do both before and after a loved ones' death. Seven Ponds also has a lot of information on alternatives to traditional funerals including cremation and natural burial.
It's important to consider the challenges that your loved ones will face after you die. Your death will be hard enough without having to deal with the financial and legal repurcussions should you die without a will.