After your engagement parties [1] are a thing of the past, it's time to continue your wedding celebration with bridal showers. [2] To read up on wedding shower etiquette

• The maid of honor [2] usually plans at least one bridal shower, but if she lives out of state, it is OK for another bridesmaid or family member to do the honors
• Bridal showers take place at least 4-6 weeks before the wedding and are a time for the bride, and her female friends, to celebrate and give gifts before the big day. It is considered poor etiquette to invite guests to your shower that are not invited to the wedding [2] so keep your showers small and intimate
• Be sure to send individual invitations just as you would to any other event leading up to your wedding
• Guests should include everyone in the bridal party [2], female family members, mother of the bride and groom, close friends and co-workers
• Most showers have themes so the guests will know what gift to bring. Most common themes are linen showers, lingerie showers, kitchen showers, etc. Be sure to include where you are registered [2] with your invitation
• Be sure to appoint a bridesmaid or family member the role of gift recorder so you can be sure to send thank you notes [2] to the appropriate guests
• Many bridal showers start off with shower games [2] (dress the bride, how well do you know your mate, etc) to get people acquainted with each other and to set the mood of the event
• Couples showers are also a way to blend the sexes in celebration and a way to keep things less formal. Bridal showers are typically thrown during the day and couples showers at night, which tend to take on the same form as an engagement party

While there will be many parties you will be invited to, you shouldn't feel obligated to attend every one. [2] Have fun and party on!

Source [3]