What should I do about my saying, "I divorce my wife if I touch any paper of yours in this office, and if I touch a paper, I will hit myself in the face with a shoe," at work?

If by divorce you intended to prevent yourself from touching papers without the intention of effecting a divorce, then this falls under the ruling of an oath. If you touch the papers, an expiation for breaking an oath becomes obligatory upon you. As for your statement, "And if I touch a paper, I will hit myself in the face with a shoe," there are two possibilities: either it is an independent statement, in which case nothing is obligatory upon you, or it is included within the phrase "upon me be divorce," in which case it is a second oath, and two expiations become obligatory upon you. If you intended to effect a divorce, then one divorce occurs upon touching the papers, unless it was during a state of extreme anger, in which case the divorce does not occur.