Christine VanDonge, Senior Research Analyst
You have some great tips, but a few other items for you to consider:
How long ago did you fail these classes? Were they general education classes or classes that are germane to the field of study you hope to pursue. If they are classes you will need to retake, it might be worth while to do so at a community college (be sure the credits will transfer first).
Where do you work now? Is the work you do relevant to the degree you hope to pursue. If so, obtain letters of recommendation from your current place of employment that address your knowledge and commitment to the subject area.
Please feel free to ask any follow-up questions!