In fact there are many websites whose whole purpose is dedicated to giving you the best deals online and information about the offers available to you at each casino. Unfortunately, a lot of these sites suffer from poor design, useless navigation systems and worst of all... poor content.
Many of these sites are little more than an online casino directory designed purely to get you to visit the site through their affiliate link so that they will get a cut of all the money that you lose (and most times you will lose!). While this referral scheme is something that is present in many different industries it is unfortunate that it makes it harder for you to find the best offers for gambling online.
Independent sites that have nothing to do with the casinos, and therefore nothing to gain, are often the best sources to go for advice. A search on one of the major search engines for different forums will usually return results where people get together and discuss such sites openly and honestly. These are other people just like you who are looking for the best deals.
Once you have found a place that will give you solid advice, you need to decide which casino is going to be right for you. These days, many of the casinos online have a one time signup bonus where they will match your initial deposit. So if you deposit $100 they'll give you a $100 bonus. The more you deposit, the more you can get for free, but remember that also gives you more to lose!
One of the best ways to find a good offer is to find a site first that offers free information or a free report so that you can do some research before you commit to joining any one particular site. If you go in with your homework done beforehand, you are more likely to walk out with a smile on your face and hopefully more money in your wallet!