Hi BJDemir,
HDL should be above 40 mg/dl and ideally greater than 60 mg/dl. I recommend you read this post - Tips on How to Raise Your HDL.
Here's a quick summary of the steps to raise HDL:
Increase physical activity to at least 30 minutes 5 days/week.
Replace saturated fats with healthy unsaturated fats.
Add omega 3 fatty acids.
Increase dietary fiber.
Use alcohol within reason (if you don't drink, don't start!)
The article I refer you to above is one I wrote, where you'll receive more details on each of the above steps.
All the best,
Lisa Nelson, RD, LN
The Heart of Health - Heart Health and Weight Loss Tips