Many people would argue that coffee is not good for weight loss.  For each person this is different, you can drink a few cups of coffee and still be successful about your weight loss.  There are a few tips that you should follow is you are going to allow coffee to be a part of your diet.

You should avoid the fancy coffee shop drinks as those are very high in calories and fat.  When making your coffee at home limit your sugar and cream amounts that you put into your coffee. If you go out for coffee avoid the extras that go along with the coffee (donuts, muffins etc)

Coffee can be beneficial.  It reduces the risk for Type 2 diabetes.  Coffee will give more energy for a tougher workout.  It will help speed up your metabolism.   Coffee can also help curb craving and your appetite

As long as watch how much coffee you drink in a day, and limit to what you put in your coffee there is no harm in using it as an aid to your weight loss.  However if you are going to use coffee to give you more energy for your workout, you should drink a cup, black at least 20-30 minutes before working out to get the full effect.