I've been putting off research in Ireland, because I haven't been able to get far back enough in the USA to make the leap across the water, so this answer will be based on search results more than experience. However, for Ireland especially, due to the great amount of record loss over time, I would follow the checklist I laid out in our question How can I determine what records are available in a particular locale?
- Learn what records might have been created.
- Research which of those records might still exist.
- Research what repositories might hold those records.
- Research which online repositories might hold those records.
The big problem is that the Public Records Office in Dublin was destroyed in 1922 in the Battle of Dublin. Also, many of the census returns for Ireland had already been destroyed before 1922:
The original census returns for 1861 and 1871 were destroyed shortly
after the censuses were taken. Those for 1881 and 1891 were pulped
during the First World War, probably because of the paper shortage.
The returns for 1821, 1831, 1841 and 1851 were, apart from a few
survivals, notably for a few counties for 1821 and 1831, destroyed in
1922 in the fire at the Public Record Office at the beginning of the
Basic principles: Investigating the laws in effect at the time, and examining the available record groups for the surviving records, should reveal whether or not researching in Protestant Northern Ireland in the post-Partition period is more like researching in England than researching in the Republic (i.e. whether or not Northern Ireland was supposed to keep records in the same format as England and Wales, or whether they had their own requirements).
Your beginning researcher has the advantage of already knowing when and where her ancestor died; she can start there and work backwards in time. Just like any other problem, begin by writing down everything known about the ancestor, and the source of that information, and work outward from those items in any way possible. Creating a timeline, writing a biographical sketch, and making an ongoing Research Plan is a must in order to keep focused.
The techniques used for burned counties in the USA may come in handy. When the census records and other records we commonly use are lost, we have to make use of whatever other materials survive. The checklist Sources of Genealogical Information is USA-centric, but might be useful as a starting point to compile a list specific to Northern Ireland. I would search for information by any means possible, including searching Google Books and other sources for eBooks of online histories which are in the public domain. One overlooked resource are online magazines or e-Magazines like Genealogy in Time, which has a news section of genealogy records by country. Their section on UK Genealogy Records includes Northern Ireland.
The July/August 2014 issue of the free e-magazine Irish Lives Remembered has a Focus on County Tyrone, with an article Tracing Your Tyrone Ancestors. It's available for viewing online and for download (issues are available for a limited time; they are usually free to view for up to 12 months, but check their website for the current offer period).
Other downloadable guides:
Webinars and Online Classes:
Blogs, Newsletters, etc:
Another trick I use for keeping track of what materials are available online is to sign up for the free e-newsletters and/or follow the blogs and Twitter accounts at any online genealogical providers I can find that would be likely to offer new records in my areas of interest. There's no point in signing up for any online provider if they don't have coverage for the area you need, and this is one way to get an idea of whether their collections will be of use. Also, reading articles with search tips before you sign up can be useful.
Other research guides and portal pages:
Mailing lists, Queries, communities, blogs: