When designing stationery you can go a more simple route keeping your design clean or you can add some new factors in. One thing that is important to remember is that you must keep your design consistent through out. Your letterhead must match the business card and the logo. It is a set and therefore it must all flow together nicely. Below I have included a variety of stationery sets which I believe are well designed and remain consistent.With all of these you quickly get the feel of the company/person and you can easily tell that all the pieces belong together.