Part of eating a healthy diet is looking at what you are eating now, and making the changes necessary to make it healthy. Although this may initially seem like deprivation, it allows you to maintain a similar eating pattern but to improve what nutritionally it gives you. It is about a mindset shift just as much as anything else.
For example, if you're used to having a burger for lunch, it might be a good idea to switch to a tuna or chicken sandwich on granary bread. The principle is the same – meat, bread, seasoning – and in comparison, if it looks a little tasteless, there's a lot you can do with pepper, paprika or a range of other light spices.