Having workout videos available makes it quick and easy to start exercising so this will PREVENT the barrier.
Understanding myths about exercising will not want to make you exercise at all. This is will NOT PREVENT the barrier. To make it prevent the barrier, try thinking about the different benefits exercise has.
Looking for inexpensive classes in the area is a great way to get for with others. I believe it will motivate you, so this will PREVENT the barrier.
By taking a PE class, exercising is automatically a set routine in your day. This will PREVENT the barrier.
By only setting long term goals, you will stress yourself out which will demotivate you. This will NOT PREVENT the barrier. To make it prevent, just start small. Every penny adds up!