They also give hints under the title of "Did you know?", and some of them are -
Databases can have indexing errors because of poor handwriting, poor legibility, or the fading of ink over time in the original records. If you find an error in the index, use the “Suggest a correction” feature.
Some databases allow for wildcard searching, that is, you can substitute a letter with a symbol to allow for more search results. For example, use “Sm*th” for Smith or Smyth, or “Fred*” for Frederick or Fredrich.
In the past, many names were written phonetically by the person recording them, such as the priest for a Parish Register or an enumerator for the Census. This resulted in various spellings of the same name.
To read the rest of the hints, go to http://thediscoverblog.com
To search for your ancestor, go to www.collectionscanada.gc.ca/lac-bac/search/anc_adv .
I have just published two booklets -
The War of 1812: Canada and the United States, and Migration: Canada and the United States.
They are available for purchase through Global Genealogy at http://globalgenealogy.com, and the National Institute of Genealogical Studies at www.genealogicalstudies.com
For more on the booklets, please visit these links -
War of 1812 - http://genealogycanada.blogspot.com/2012/01/booklet-1-war-of-1812-canada-and-united.html, and
Migration - http://genealogycanada.blogspot.com/2012/01/booklet-2-migration-canada-and-united.html