A lot of bookmakers offer telephone betting services, and they are usually very straightforward to use. It's a simple matter of calling the relevant number, telling the operator you reach which wagers you want to place, confirming the odds, and then providing your credit card details. Some bookmakers take other payment methods too, and some even offer credit lines to select customers.

Spread betting are wagers that are made against the spread. The spread, or line, is a number assigned by the bookmakers which handicaps one team and favors another when two teams play each other and one is perceived as being more likely to win. The favorite "takes" points from the final score and the underdog "gives" points. This number can also be in increments of half-a-point (.5) even though very few sports have .5 point scoring (i.e., The Ryder Cup)
The spread - The point spread is used in high-scoring sports like football and basketball. It is basically a handicap used to make all games competitive in the eyes of bettors. The spread gives one team an advantage of a few points. Standard notation for the point spread shows the favored team first, followed by a negative number (the actual spread). The home team is shown in capital letters. So if Buffalo was playing against Green Bay in Green Bay, and they were favored to win by seven points, it would look like this:

Even if you’re brand-new to betting on football, you’ve probably seen NFL spreads published in the paper or talked about on TV. The point spread levels the playing field, making betting on either the favorite or the underdog equally attractive. Either the favorite has to win by the margin listed, or the underdog has a buffer to lose the game by that margin, or win it outright.

Totalizators. In totalizators (sometimes called flexible-rate bets) the odds are changing in real-time according to the share of total exchange each of the possible outcomes have received taking into account the return rate of the bookmaker offering the bet. For example: If the bookmakers return percentage is 90%, 90% of the amount placed on the winning result will be given back to bettors and 10% goes to the bookmaker. Naturally the more money bet on a certain result, the smaller the odds on that outcome become. This is similar to parimutuel wagering in horse racing and dog racing.
As the numbers grow larger each way – the small numbers get smaller or the positive numbers get larger – that indicates that those options are bigger and bigger favorites, or bigger underdogs. That’s particularly relevant when you’re looking at something like the odds to win the Super Bowl. The teams with smaller numbers are deemed as having a better chance of winning and then as the numbers grow larger, those teams are deemed bigger and bigger longshots.
Making money from betting on any sport requires an understanding of how the betting markets work, and an ability to use that knowledge to gain an advantage. No-one makes a consistent profit from simply following hunches or relying purely on statistics and trends. Sports handicapping is something that people often assume is very complicated, but the basics are actually relatively easy to grasp.
That was all before Charles McNeil, a math teacher from Chicago, invented the concept of the point spread. An avid gambler, McNeil created what he called “wholesaling odds” and started his own bookmaking operation in the 1940s. He started out offering this new style of betting on football, but his business model grew to include basketball.  McNeil changed the way sports betting was done, and his legacy lives on today in what we now call the point spread.
Since more people wager on football than any other sports it’s usually the easiest game to figure out how to bet. If you don’t know what to do, you can probably ask anyone in the sports book for instructions. The people visiting the casino might not know everything but they can give you the basics. Here’s a fairly thorough look at the different ways you can wager on football in Las Vegas.
The handicapping, sports odds information contained on this website is for entertainment purposes only. Please confirm the wagering regulations in your jurisdiction as they vary from state to state, province to province and country to country. Using this information to contravene any law or statute is prohibited. The site is not associated with nor is it endorsed by any professional or collegiate league, association or team. OddsShark does not target an audience under the age of 18. Please visit gambleaware.co.uk or gamcare.org.uk for guidelines on responsible gaming.