Estate planning is vital
By Bankrate.com

You have accumulated more assets, bigger-ticket items and have more responsibilities. Estate planning is vital. If you die without a will, the state becomes the executor.

Links:
It's never too early to make a living will, What is a will?, Preparing a will, What in the world is a trust?, Beware trust scams, Getting a will through probate, Estate executor: No job for amateurs, Picking a guardian for your child estate planning, Financial considerations for unmarried couple

Receiving an inheritance
Adopt a methodical approach, not an emotional approach. Deposit the money into a liquid fund where it'll earn interest. Step back, decide how you'll use the money, then select the best investing vehicle to meet your overall financial goals.

Links:
After an inheritance, emotions, finances mingle, The ABCs of inheritance taxes, Estate taxes basics, Reducing estate taxes, Interviewing a financial adviser, Investigating a financial adviser