Even though you've gotten engaged as a couple, this day is mainly about the bride. More often than not, the bride is the one who makes all the major decisions: how formal or informal the wedding will be, the theme, the colors, the decorations and the list goes on and on. Afterall, this is the day she's dreamed of all her life!
After all the major selections have been made, such as reception site, ceremony, dress, invitations, etc, it's now time to choose all the little things for the bride, such as that "something blue"
, bridal garter
, bridal purse
If you are having a theme wedding, choose the accessories keeping in mind the general theme. Coordinate colors too to give a feel of uniformity with the whole wedding decor.