My husband and I are legally separated and we want to "undo" it and stay married without a lawyer. How do we do it?

You need to check with your state laws, or an attorney. Here in Mass., it would not be necessary, though it would be advisable, to "undo" a legal separation. This is because the proceeding requires that the parties be living separate and apart "for good cause". If they are not living apart, then the law has no application, and neither party could hold the other liable for contempt for not complying with the court orders. However, I would urge the parties to put together a simple agreement stating in clear, certain terms that they agree that the proceeding dated on such and such a date and all orders issued thereunder, should be dismissed. Date it, sign it, make several copies, and file the original in the court.

Technically, in Nevada, there is no such thing as "legal separation." We DO have a statutory provision for "separate maintenance." First, carefully examine whatever paperwork you have. Then read the materials set out at http://www.willicklawgroup.com/separate_maintenance, which should answer your questions. If it does not, then you should consult with qualified counsel.