Review the documents.  Even the best Title Attorneys/Title Closers make an occasional mistake.

I do most of my stuff before closeing

I like Fred Griffin 's answer.  A

Big Checks are always nice.

I say, 'Thank you' and wish them luck in their new home.

Make sure everyone is treated accurately and fairly.

I don't always do something at closing. I like to stop by later and surprise them with something suited to them.

By the time we get there I believe they know all the special things that happened. The closing is the icing on the cake.

It's tailored to each individual client - I listen during my time with them and select something fitting to them. Like, Debbie Reynolds, I stop in after Closing - it's less chaotic that way and they appreicate it more, I think.

It all depends on my clients, some get GC's, some cleaning services, and most get a bottle of wine in a basket of goodies. Right now it's a bottle of wine and stemless crystal wine glasses.

I prefer to stop by after they have gotten settled in and surprise them with something really nice..gift cards,etc.

Provide them with an outstanding experience through the process so it is as stressfree and beneifical to them as possible Brian Burkhalter 

Cutting board for sellers and buyer party that I sponsor

Our closings are pretty uneventful as we don't have a "closing table" in California.  Many times for a seller it's a phone call --- we are confirmed!  For buyers it will likely involve handing them the keys.  Both are good.  

thank them for the business.....

I like to hand them their keys and thank them for their business. I let them know if they need anything ... to call me. I'm here for them long after the closing.

I make sure all the documents are correct and accompany them to the closing.... but most of that is done before closing except the attendance.

Gifts, meals out, house warming parties, gifts for the kids...depends on the client.

Brian Burkhalter commit to be with them all the time - even after closing!

we send monthly cookies for a year

Nice Fred Griffin.

I hand them a key. Give them a gift card and wish them the best. Sometimes I get a barrage of compliants not getting their money worth. So why not purchase it? 

We like to give them a nice coffee table book about our state or take them to dinner.

I put together personal baskets for my customers

Others have answered 

What Fred said.

A special gift basket personalized for them is always welcome. That, and of course, making sure all their questions are answered at closing and the keys are available and all their utilities transferred.

Make sure the prorations are right on the HUD 1 and keep the spider monkey kids from climbing the stacks of law books, putting their parents keys in the electrical outlets. There is much to happen to get to the successful real estate closing.

Make sure they understand the process.

Brian Burkhalter Thank them for their business and ask for referrals.

Working with me is the pleasure. However, I have given out Pearls for the Soul a collection of positive and uplifting sayings. It is always well received

Kevin J. May nailed this one!

'Special things"

Hmmm,

I deliver a portfolio of services I know they will need,

The most recently added to the package is a tool that addresses the question, "What will happen if I file an insurance claim? Will rate increase? What is deductible? Can I change to another insurer? What is the benefit to me to hire an attorney?"

Of course, don't over look the tub of LED lights so they can bring the house into the post incandescent era.

I attended all closing to be sure the documents were all in accordance to the contract and help resolve any questions.  

Change the locks

Keep them from making mistakes.