A few marriage fitness products I can recommend:

Ultimate Guide To Finding The Perfect Work At Home Job
This Guide Provides Over 160 Companies That Regularly Hire People To Work From Home In The Areas Of Call Center Support Representative, Court Researcher, Data Entry, Direct Sales, Transcription, Virtual Assistant, Virtual Juror And Writing.
Ultimate Guide To Finding The Perfect Work At Home Job

Dating For Geeks
The Essential Guide To Love For Intelligent Young Men. Written By A Geek, For Geeks, This Book Covers All The Basics Of Dating And Focuses On Building A Broad Base Of Social Skills. Great Niche! No One Needs Dating Help More Than Geeks!
Dating For Geeks