Pre-Wedding
If the bride asks about helping her with ideas on where to have the wedding, help her with scouting around and going to the different places. It may be a great idea to drive so she can focus on each location.
If you have great penmanship it is always nice to volunteer to address at least some the invitations if the bride agrees. Many times a bride may outsource her invitations but if they need to be addressed by the family, your help will be key in reducing the load of tasks to complete.
Your friend may need help in ordering and choosing decorations and favors, your opinions may be helpful in making decisions for narrowing down choices and making sure the decorations are in on time for the wedding, shower and bachelorette parties.
It is a major treat to go with the bride when she is shopping for her wedding dress. She may even invite you to be involved in picking out the Bridesmaid Dresses. It is very important to help make sure the dresses are ordered and arrive in enough time for alterations!
Make sure to pick up your bridesmaid dress in a "reasonable" amount of time in case of additional fittings.
Many times the groom does not want to go to register with his bride-to-be. You can be very supportive by going with your friend to register for her wedding gifts as well as letting other guests know where the bride and groom are registered. This is a very fun experience so take part in the choosing if she needs help.
Help the bride in the seating arrangement. This can be a very difficult process with the more people coming to the wedding. Many times it makes it easier to draw out the tables and move people around until you have a close to perfect fit. Note: It is very helpful to bring this drawing to the wedding just in case there are any mix-ups, you will save the day!
Help Plan the Bridal Shower with the Maid of Honor as well as the Bachelorette Party!
Be a good communicator with information. Many times information prior to a wedding does not reach everyone. Friends will appreciate confirming plans of each shower and party as well as wedding day information.
Attend and help out during the rehearsal dinner. Many times the bride, groom and their families are pre-occupied and forget about things which is where you can save the day by being supportive.
Wedding Day
Assist the bride in getting into her dress and makeup
Ask if the bride needs anything (food, water, etc) all the way up till the time she is walking down the aisle. She will really appreciate it!
Assist the other bridesmaids on where to go and timing, especially if they show up late.
Help make sure the bride has privacy if she needs some quiet time before the ceremony.
Be the witness in the signing of the marriage license which is an honor!
Assist the guests to their seats and be social prior to the wedding. The guests love to see the bridesmaids and groomsmen out and about.
Take some deep breaths and walk slow when you walk down the aisle since it is common to speed up. If a groomsman walks down the aisle with you, make him refrain from talking or fooling around.
Always look for the unexpected since it is common for the most uncommon things to happen (i.e, something falling down at the alter). If you are close enough, fix what needs to be fixin so the bride, groom and their families can focus on the ceremony.
If you are single, make sure to mingle and have a great time at the party! It is mandatory to catch the bridal bouquet :)
If you are with your partner, make sure to dance and socialize since it means a lot to the bride and groom (when they have time to sit down) to see their friends having and creating a good time for themselves and the other guests.
Last, but not least, Provide moral support and be a great listener throughout the process since it is a very wonderful and "positively" stressful time for your friend. You can really make the difference!
Make sure to take lots of pictures at the reception, wedding procession and aftarwards. Many forget to take pictures and the bride and groom will appreciate them!

After receiving the honor from your friend to be a Bridesmaid or Maid of Honor in her wedding, planning will become one of both excitement and time management. You will become more and more busy as the wedding approaches. A bridesmaid that plans ahead will enjoy the experience much more than one who will stress at the last minute preparations including getting things ordered, picked up, sent out, brought in and just right!
One of the most important traditions of a Maid of Honor or Matron of Honor is to give the Bride a Toast. Traditionally, the speech would be given during the wedding party in the first half (before people begin to leave) and would focus on the bride. Bridesmaid 101 recommends making a wedding toast that includes various emotions. The best toasts include funny stories growing up with sentimental friendship and love. Some Maids of Honor like to be spontaneous and not rehearse anything prior to making the toast while others (the majority) usually bring notes or a prepared speech.