There are Top Several Wedding Gifts Parameter for any Couple to decide for The Best Gift like this :

They are your... 
What is the recipient's age?
Who is the gift for?
Reason for the gift?
 

Here We help you to find The best of these , Specially about Idea : 

They are your...

Friends , Parents , Brother / Sister , Son / Daughter , Grandchild , Grandparents , Nephew / Niece Baby Sitter , Client , Co-Worker , Employee , Teacher

What is the recipient's age?

Ages 12-65 & Over

Who is the gift for?

Her , Him , Couple

Reason for the gift?

Of course is Wedding but you could Gifting For other reason like :

Occasions , Holidays Or Expressions

Occasions :

Anniversary , Baby Shower , Baptism , Birthday , Bridal Shower , Family Reunion , House Warming , New Baby , Prom , Retirement , Wedding

Holidays :

Sisters Day (Aug 5, 2006) , Friendship Day (Aug 6, 2006) , Grandparent's Day (Sept 10, 2006) , Bosses Day (Oct 16, 2006) , Sweetest Day (Oct 21, 2006) , Halloween (Oct 31, 2006) , Thanksgiving (Nov 23, 2006) , Chanukah (Dec 15, 2006) , Christmas (Dec 25, 2006) , Kwanzaa (Dec 26, 2006) , New Year's (Jan 1, 2007) , Super Bowl (Feb 4, 2007) , Valentine's Day (Feb 14, 2007) , Mardi Gras (Feb 20, 2007) , St. Patrick's Day (Mar 17, 2007) , April Fools (Apr 1, 2007) , Passover (Apr 3, 2007) , Easter (Apr 8, 2007) , Earth Day (Apr 22, 2007) , Admin. Prof. Day (Apr 25, 2007) , Cinco de Mayo (May 5, 2007) , Teacher's Day (May 8, 2007) , 4th of July (July 4, 2007)

Expressions :

Bon Voyage , Cheer Up , Congratulations , Crazy for You , Farewell , Get , Well , Good Luck , I Love You , I Miss You , I'm Sorry , Just Because , Keep in Touch , Let's Party , Motivational , Sympathy , Thank You , Thinking of You , Welcome , Welcome Home