Genealogy research is not really detective work. It is filing work disguised as detective work. The historians who get furthest are not the cleverest — they are the most patient and the most organised. This playbook focuses on the records that produce real results without a paid subscription, and on the habits that keep you from chasing the wrong John Smith for a month.
The four record types that move trees forward
Most amateur trees grow from just four record types: census returns, civil registration (birth, marriage, death), parish or religious registers, and immigration or naturalisation records. Almost everything else — wills, military service, electoral rolls — is supporting evidence. Master the first four and you will outgrow most beginner walls.
Census returns
A census snapshot gives you an entire household on a single date: who was living together, their ages, occupations, and birthplaces. That last column is gold. A grandmother listed as "born Galway, Ireland" in a 1900 US census collapses three months of speculative searching into a focused hour.
Civil registration
From the mid-1800s, most Western countries kept official birth, marriage, and death indexes. They are usually free to search and inexpensive to order. Marriage records are especially valuable — they confirm a maiden name and frequently list both sets of parents.
Parish and religious registers
Before civil registration, religious institutions kept the records. Catholic and Anglican registers in particular survive in vast numbers, often digitised by volunteers. They are the only way to push most European lines back beyond about 1850.
Immigration and naturalisation
For families that crossed an ocean, the immigration paper trail is the bridge between continents. Passenger lists give you a port of departure; naturalisation petitions often name the exact home village. Without that detail, "from Italy" is unsolvable.
Free archives worth bookmarking
- FamilySearch — the largest free genealogy archive in the world, run by a non-profit
- National Archives sites — most countries publish censuses and civil registers free after a privacy period
- FreeBMD / FreeREG — volunteer-transcribed UK indexes
- Internet Archive — out-of-copyright local histories and parish directories
- Wikitree — collaborative trees with citation requirements
The single habit that prevents most mistakes
Write down where you found every fact. Not in your head — in a notes field next to the person. "Born 1887, per 1901 census, household of John Murray, Dublin" is dramatically more useful than "Born 1887". Six months from now, when you find a conflicting record, your past self will have left you the breadcrumbs to resolve it.
Brick walls and how to climb them
Every researcher hits walls. The most productive responses, in order: search for the person's siblings instead, search neighbouring households in the same census, switch from name searches to address searches, and finally, look for the person's children's marriage records — they often name parents the original records have lost.
When to stop
You do not need to trace back to medieval Europe to have a meaningful tree. Most families find the sweet spot is four to six generations — enough to surprise relatives, not so much that nobody recognises anyone. When you reach that point, build a clean printable chart and share it. The reactions you get will be a better reward than another database hit.