The next thing to look at, what are the goals of the client? Many clients like personal trainers simply to help them work out, no specific goals but general overall fitness. For these clients, percentages are probably unnecessary as you as the trainer can monitor their intensity and effort by watching. If it is an athlete preparing for their sports, intensities will give you a great guideline to go by and allow you to accurately pick a weight for their work sets that will increase their potential for strength.
Secondly, you can start reading, watching and listening to the news online. News are constantly updated online and provide you ”the edge” when it comes to getting the latest information. If you are only accustomed to read the newspaper every morning, you miss out to compete with the others that know how to use internet to find the latest information.