Compiling and Mailing Federal REturn

My Federal Return has quite a number of forms.  How should I enclose it in the envelope with a paper clip or should I try to staple it as one big package (not sure if that will work) or use multiple stapes for each of the different folrms, etc..  I know that the W-2 for should be stapled to front page since it had tax taken out and that the 1040-V Payment voucher and check should just be on top of return and not attached any where.