If your hair is very curly, don't try to go bone straight -- you'll end up with a lot of damage, breakage and a dry look. Instead, consider relaxing the hair as much as possible and using styling tools to get the look you want. Try to wait a couple of weeks, and/or do a few deep conditionings after removing extensions, before you straighten or perm your hair -- the damage they cause can result in an uneven process and breakage. If you do it yourself, look for a mild product -- many that are formulated for African American hair are too harsh. Don't repeat the processing more than every three months.