Regardless of the scale at which you are going to utilize the free hoodie shirt mock-up PSD file (personal or commercial), it is always a good idea to start with sketching the designs first. By doing so, you will be able to think of more exciting ideas while you are drawing them on pieces of paper. In addition to that, you can also keep the sketched ideas with you and revisit them later on just in case you need inspiration from your creative thoughts. And if you find digital sketching more convenient, then you can go for that too – as long as it is serving the purpose.