One source to gain that information from are travel agencies. However, as their income is generally based on how much you pay, they might not give you all the information you need. You need to find more reliable and more thorough sources. Thankfully, the information era is here and you can tap to millions of pages worth information with just a few clicks.
The world wide web is your friend. There are countless pages offering objective reviews of different travel resorts. By looking through the reviews of those resorts that are within your price range, you can quickly weed out those that are of poor quality.
There are also web sites that offer discounts for certain vacation packages. They are often more competitively priced than those offered by offline travel agencies, as online companies can cut costs where traditional ones cannot. This edge directly cuts the costs of your vacation.
Perhaps the most important information you can get from this kind of web sites is the information of what you need to have with you. Some travel resorts, for example those in the Pacific or Indian areas, are not equipped with everything you might be used to. Especially so, if you need to pick a budget resort.
Unless you have all the required items with you, you may need to buy something you have no need for afterward. This adds to the cost of the vacation and is an unnecessary burden to your travel budget. By thinking ahead and making sure you take with you everything you may need, you can avoid costs and use the money for what it should be: entertainment and leisure.