Have a quick look at the images on your web site.
Are they clear?
Do they convey professionalism?
Do they show your visitors exactly what they will get from using your service or buying your product?
A picture DOES say a thousand words so make them all count!
If your images are not up to scratch, look for examples that will impress. Browse www.123rf.com or www.istockphoto.com. Great images are not hard to find.
Or call your web designer or graphic designer if you want someone to look after it for you.