Gather as much information as you can by talking to members of your family. As well as memories and first-hand accounts, they also may be able to provide you with originals or copies of documentation such as birth, death and marriage certificates, or less formal, though no less valuable, resources to further you search.

For instance, items like diaries, scrapbooks, letters, and old address books. School reports, qualification certificates, apprenticeship papers, trade union cards, pension cards and newspaper cuttings are also vital sources of information.

Photographs are particularly useful: they not only provide a tangible link to the past but can also serve as aids to memory. They'll often have details written on the back - so don't forget to look! If they haven't, then make sure that you record the essential details - who it is, when was it taken, and where they lived - as you discover them.

All families generate tall stories or myths around themselves. Don't discount them totally, but be aware that they may only contain the smallest grain of truth. It's up to you to sort out the facts from the fiction by cross-referencing with other family members or documentary sources.

Family history is a popular pastime, and a range of courses have built up around it such as community education classes in Rhondda Cynon Taff and evening classes at Cardiff University. Your local library, college, university or council will be able to provide you with details, or you can also look in journals devoted to family history and genealogy.

Local family history societies are another option. Joining will take you into a community of interest, which can only further your search. There may even be someone who's already researching your family! The Federation of Family History Societies can provide you with details of a society near you, or in the area your ancestors came from.

Of course, the internet is now a major resource with a growing range of superb genealogy and family history websites - see our own Family History Web Guide for details. The net will also provide you with access to official documentation such as census returns, databases and even software to help you construct your family tree.

But before you get carried away, remember that, like any other tree, you won't get your family tree to grow without a good root system - and you are that root system.

Your task is to work backwards systematically, generation by generation. Trying to work forwards from the past will undoubtedly lead you up many blind alleys, which will only make your task more difficult.

Remember also that a search for a family history can't really be divorced from its wider historical and social context - so be prepared for some surprises! You may find that a simple search for your roots takes you on a fascinating journey through time, place and history.