Many are busy with work, kids, and activites. When can you find time to train your dog. Dog training doesn't have to be hours long, even a few minutes a day can make a huge difference.
Try carrying around your dogs kibble in a treat bag. This gives you the opportunity to reward frequently while they are doing some behavior you want. Or spontaneously train them when the perfect time arises. Like making them wait at the door while someone walks in.
Train during a commercial while watching TV. Dogs are pack animals and chances are they will be sitting right next to you while you are watching.
Take them with you to an activity or out with you while you run errands. Like when you attend one of your kids sporting events. The distractions will be a great opportunity to train.