From time to time everyone has a problem with constipation, however it is important to get it checked out by a doctor if the problem persists as it can be a symptom of something more serious.
The best thing to do is to increase the amount of water you drink.
Try to eat plenty of fibre rich foods, plenty of fruit and vegetable and pulses. Try to avoid sugary and fatty foods and consider eating less carbohydrate for a few days.
Exercise plays an important part, you need to move you body to help your systems circulation.
Psyllium which is rich in fibre is a good supplement to try.
It is not healthy to take laxatives regularly as it can damage your digestive tract.