Which Bible study?
There are many types of Bible studies that area available. Some are geared for a quick study on the subject. Others are geared for a more indepth study on the subject. The following studies are found online and are useful.

Bible Studies on Salvation

• City of the Living God
• Into His Marvelous Light
• Rightly Dividing the Word
• Conglomeration of Studies
• The New Birth Experience

Bible Studies on Holy Ghost

• City of the Living God
• Difference: Gift and Baptism
• Speaking in Other Tongues
• Who is the Holy Ghost?

Bible Study Tenets

• Do not be in a hurry.
  Take about 30-60 minutes only. Usually, the human mind cannot digest material over that amount of time.
• Leave a Time for Questions at the End
  Do not allow there to be too many questions during the study or it will get bogged down and you will not be able to get the biblical truth brought home.
• Only One Person Giving the Bible Study
  It is difficult to give a Bible study when there are more than one person directing it. It flows better with only 1 person and makes it easier to grasp.   
• Provide Material to Them for Study
  Sometimes, the recipients of the studies will want to take time to study the material. Give them the Bible Study, so they can study it and call them later in the week to see if they have any questions.