A very useful tool to have for garment construction is a pressing ham.  I have a lozenge shaped ham that is helpful for pressing sleeves without creating a crease.  It is also helpful to have an ironing board that has a rounded "point" at one end.  This lets you get into some of those narrower areas like shoulders a little easier.  A steam iron is also helpful for clothing construction to press sharper creases when you need them, like in pleats and folds on seams.