I generally get the directions with a block ( or part of the quilt) with scrap fabric before I cut it all out. I generally follow the cutting instructions because generally they have worked out the best order for things to be cut. Most patterns will tell you the largest part to cut and the sub cut into the smaller pieces. If you just cut off those smaller pieces you might end up with a lot of unusable ( for that project) scraps and not enough fabric to complete the project. If you DO cut ahead and have to move your fabric ( to make way for dinner, like I do) be sure to keep them organized in zip lock bags or something, so your carefully cut pieces don't go astray !