CONDOMS
If you want the church way... ABSTINENCE! Or Natural Family planning! Otherwise condoms or the pill are pretty effective methods... Methods like pulling out aren't as effective. Be careful wit this one
Even the most effective birth control methods, such as IUDs and Implanon prevent unwanted pregnancy at a rate of 99.9%.
The question makes no sense - of course birth control is the most effective method of birth control. And the best form of birth control is to use two methods at once. Either a hormonal form such as the pill, patch, or vaginal ring and a condom, which also prevents the spread of disease. Avoid quack methods like the "pull-out" method (pre-ejaculate does contain sperm even before the man ejaculates) and other wacky ideas.
Birth control suppositories are one of the least effective methods to begin with. Withdrawal is more effective than spermicide used alone. Consider getting some condoms and throwing out the expired suppositories.
The birth control pill, if used correctly, has over a 98% chance of preventing pregnancy. Other methods with high efficacy in preventing pregnancy include the Depo-Provera injection as well as birth control implants and IUDs. However, the most effective form of birth control is abstinence.
Birth control patch
There are several effective methods of birth control. If you are in the U.S., Planned Parenthood is a good source of information. You can also consult your doctor.
Probably praying is the least effective form of birth control.
In my opinion, there are less expensive options that are every bit as effective and with low side effect profiles.
Most birth control methods are very effective, but there is always a very slim chance of getting pregnant. For example, condoms can break, and the pills effectiveness can be lowered when taking antibiotics.
"Contraceptive" and "birth control" are synonymous. All contraceptives are methods of birth control.