I went thru this last year. If you have minor children and/or a house you should definately do this.
A will is a document that gives your intent on who you want to take care of your minor children, manage your affairs, whether you want to be cremated or buried, who receives family heirlooms and whatnot.
A living will leaves your last wishes if you become incapacitated on how long you want to be kept on life support, etc... who makes the decision to pull the plug, etc...
A trust is a document and a vehicle for "pooling" your assets, so that a trustee (or a list of trustees in order of succession that you designate) can manage your entire estate if you pass. For example, I don't own my house - my house is owned by the "revocable living trust of jw7, jw7 trustee". If I get hit by a bus tomorrow, my trust is the benificiary of my life insurance, not a specific person.
The main purpose of the trust is to avoid probate between possible default inheritors of the estate if you don't specify a succession of trustees.
So the minimum things I would ask for is for them to prepare:
- A last will and testament
- Power of attorney
- A living will
- A revocable living trust
If you find a firm or attorney to prepare this, the process is to fill out boilerplate documents. Then you get them notarized, fund your trust (e.g. put your house in your trust's name) and give copies of your wills and trust to your succession of trustees.
I'm sure I screwed up on a couple of lawyer details, but I hope that helps a bit.