Personally for me, I though of it as more if love letter to my fiancé, I wrote down all the things I am grateful for when it comes to him and our relationship, the plans for our future and mainly just saying I love you.
Picture it just being you in the room with your fiancé and share with your fiancé how much you love them. These speeches do not need to be long at all as long as it's from the heart.
Write from your heart. The reason you want your own vows instead of repeating after the officiant is because you want words that reflect you and what you want to say to your spouse. It doesn't have to be long either.
Tell your partner you'll be there through thick and thin.
Share personal stories.
Actually make promises. Acknowledge the support you'll need from others.Wedding Vow Tips
Don't wait until the last minute.
Make a list of all your thoughts.
Write up to three drafts.
Don't try to include everything.Avoid words like "always" and "never." Embrace sentimentality. Go after laughter. Practice reading out loud. Indicate pauses and intonation. Ask a trusted friend to listen.Make a fresh copy of your vows for the ceremony.Keep the vows a secret from your partner until the ceremony.