If you are looking for a fun filled holiday abroad then you may want to pre book some activities to do when you are there or at least research them prior to your departure.
Depending on where you go, you may have a huge range of activities that are available to you such as water parks, walking / hiking, shopping, theme parks and visiting historical sites or places of interest. Often you can book many trips thorough sites such as Trip Advisor and this way you have the added protection that if they do not turn up or the trip gets cancelled, you will be able to easily get your money back.
Make sure you do plenty on researching in to the places you want to visit. Find out what days and what time of the day is best to go, what you can expect and if it is safe. This may be especially true for theme or water parks abroad where safety rules and regulations may not be as strict as they are in the UK.
Be sure to have a look online and in local magazines or papers for discount vouchers. Often you can find these in advertising leaflets that are usually located in the reception area of your accommodation. These can often save you quite a bit on the ticket price.