Every wedding I've ever attended and filmed, I've always had a very detailed timeline to work with. Having said timeline ensures a good flow of the day's events, and definitely keeps everything on track.
Below is an example timeline of a wedding and reception held at the same location, with the ceremony itself starting at 5:30pm. Keep in mind this can be the FRAMEWORK of your day. If you have your ceremony at one location and the reception at another, keep in mind there will be travel time to include in your timeline, respectively.
12pm- Photographer and videographer arrive to bridal party getting ready. Detail shots should be taken during this time (as well as the groom and groomsmen getting ready)
2:15pm Women are just about done with hair and makeup. Shots of bridesmaids in matching robes
2:30pm Bride gets dressed
2:45pm Bridal Portraits
3:15pm Bridesmaid photos
3:30pm First look
3:30-4:10pm Portrait photos together
4:10-5pm wedding party and family photos
5:30pm wedding ceremony
6:15-7:15pm Cocktail hour
7pm Sunset photos
7:15pm Guests invited to dinner
7:30 Bridal party entrance and first dance
7:30-7:45 welcome toasts
7:45-8:30 Dinner
8:30-8:40 Toasts
8:40-8:50 Parent Dances
8:50-9:15 Cake cutting, bouquet toss, garter toss
9:15 Open dance
11:30 Grand exit
Once again, adjust for your day and what you will have going on. Perhaps you won't do a first look, or garter toss, etc. Keep in mind sunset photos may be at 4pm during winter months, so adjust accordingly.