Here's my method:
www.familysearch.org
Click on Tab: Search
Click: Lefthand side International Genealogical Index (IGI)
Enter: First and Last Names
Dont Enter: Spouse or Event (yet!)
Enter: Year
Year Range 20+
Region
(once you have entered British Isles) the screen will change slightly
Country
County
*Note: Batch No. area you will use this later!
Click: On appropriate name from list
If correct person:
Click: On Batch No.
The Batch No. refers to the family page in the church records. If there is no Batch No. (only a film No.) you have come to a dead-end in that particular search.
If you see a list of names they are probably relatives of your search (uncles/grandparents, etc).
By returning to the front screen * you can enter another Batch No. but either change the C to an M or P (see below for explanation) or change the last digit in the row of numbers to a lesser No. At this point enter only the last name do not put in any other information.
I think C means children, P means parents and M means marriage.
I have more in-depth instructions which I can send later.
Good Luck! Isabel