Your goals should define the way you train and your program. They inform your decisions on rest between sets, overall workout volume, rep ranges to aim for, exercises you do, intensity and recovery days you take.
Don't just follow advice given to you regarding any parameter of your training without considering your goals first and how if it truly suits your purposes.
Once you set your goals, stick to them. Your training is a journey and needs a clearly defined constant. Don't keep hopping from one goal to another and then back again. Most people are guilty of this and it's one of the reasons why they never get anywhere in their training.