Acknowledge your sources and ask permission to use them
One of the pleasures of family history research is sharing your results with other family members and researchers. However after putting many years into your research it can come as a shock when doing a casual internet search, when your work suddenly appears on someone else’s site, with no acknowledgment (and indeed no permission).
This has happened to me, and I’m sure to many others.
In most cases, of course the records themselves are publically available. Many records however are not available on-line and are certainly not free. Further, it takes many hours of searching and compiling records in the archives to find and link records.
There are plenty of resources available to those new to family history on how best to acknowledge your sources.
The National Genealogical Society has produced a useful guide – Guidelines for Sharing Information with Others.