Wedding favors are just a tiny thank you for your community's effort to show up at your wedding and celebrate your marriage.
They are not absolutely necessary but can be a sweet gesture.
Some basic rules to follow in looking for favors for your wedding guests are:

1. The gifts are best when in keeping with who you are.
   
2. The gifts don't break the bank.
   
3. They're easy to take home in a suitcase.
   
4. Gifts referenced in the wedding ceremony have more meaning for your wedding guests.
   

So, once you establish some boundaries for how much you want to spend on this, there are a few different options.
It's important to remember that these gifts are a token.
Since there's no way you could really thank people in a way that's commensurate for your gratitude, you want to think about something that's thoughtful and maybe even useful.
You don't want to give your wedding guests something they don't need but will feel badly about throwing away.
Here are some categories to think about:

• Objects: ok, hands down the best "object" I ever got at a wedding (and I've been to over 1,000) was a color coordinated tire gauge.
  Their colors were green and purple, they had a problem with their car and were standing in an auto supply store, and bingo there they were.
  It slipped in a purse or pocket and to this day resides in the glovebox of my car.
  In their honor, I even learned how to use it.
  Think about quirky, useful items (tiny, so they're easy to take home.
  ) Votives also win favor in my book.
  Can you have too many?
• Food: the original favors were those sugar-coated almonds.
  Almonds represent the bitter of life and sugar (obviously) the sweet.
  Meaning: Life is hard, but a loving marriage can make it all enjoyable.
  Check out your ethnic heritage, there maybe something there you can choose.
  Sometimes I feel like we're kids at a party with goody bags and people are giving little packages of tea or coffee or hot chocolate.
  There are lots of options.
  But try not to bake 800 cookies the day before your wedding!
• Something living: people are giving plants or seeds to celebrate the happiness that's being sown on the wedding day.
  These are a wonderful gesture, if you think people will really put them to use.
  When I kill a plant, which I always do, I can feel pretty guilty.
  I like it better when you plant trees in my honor, or a garden in a park .
  
• Charitable donation: make a donation in the name of your guests to a charity that is dear to your heart.
  Don't make it controversial, let everyone feel good about the charity you've chosen and your thoughtfulness.
  
• Something you've written: put together a booklet of thank yous for your wedding guests.
  Not for the presents, but for who they are.
  People love to hear that they are special in your lives and enjoy knowing how other people are connected as well.
  

You really can have fun with this.
It doesn't need to be one more thing that needs to be done.
And it is a token of remembrance you are giving your community for their willingness to share this great love -- which you are turning into a lifelong marriage!