People open their businesses without a solid business plan. Build a successful turnkey website business depends by your primary actions (and your focus).
You need to choose a winning market before to start (it's very important). Consider these niches:
People want to be safe in their life and surroundings. They want to avoid danger or others threatening them or their loved ones. You could target niche products like home safety items, CPR classes, local hazards information, etc.
Most people want to achieve goals in their life and career. You could target product niches like goal setting information, motivational products, hypnosis, seminars, etc.
Many people want to learn a talent or skill. You could target product niches like educational classes, home training, personal training, how-to publications, how-to videos, etc.
Many people want to look different than their age. You could target niche products like anti-aging products, make-up, clothes.
People want to fulfill a craving, especially when dieting. They would prefer things tasting fat or luxurious while not actually being fattening. You could target product niches like low fat foods, low card foods, sugar free foods, etc.