abstinence.
i think the most effective method is a condom and the pill No it is Abstinence
refrain from any sexual contact (kissing is okay so is holding hands, hugging and other casual physical contact) or in other words NO SEX you may think that a condom will prevent that but it wont 95% of the time
Aside from abstinence from vaginal sex, the contraceptive implant Nexplanon is the most effective. It has the lowest failure rate, there is no way that patient error can affect how well it works, and it's completely reversible.
Prevention is the safest and most effective method of birth control. Hormonal methods (the Pill, Mirena IUD, Patch, implant, DepoProvera) are highly effective when used as directed. Barrier methods (cervical cap, diaphragm, condoms) are also effective. Some women choose abstinence and fertility awareness. Once a pregnancy is established abortion is the only means of termination.
Washing your hands.
Abstinence and don't share needles. The second and third best options are to wear a condom and not have multiple sex partners.
Searching all entrants upon entry and prior to egress may be the most effective, but simple camera coverage- with prominent signage- seems to be the most effective.
There are a number of methods that can be used to separate methanol from surfactants. The most effective method is extraction of the cationic surfactants by contracting the mixture with water.
Handwashing
The options for a man who wants to avoid fathering a child are abstinence from vaginal sex, using codoms, withdrawal or coitus interruptus, and vasectomy. Abstinence is the most effective, followed by vasectomy, condoms, and withdrawal. In addition, a couple may use methods under the control of the female.
Currently, surgical sterilization is the most effective. Both vasectomies and tubal ligations approach 100% in effectiveness. As far as less-permanent methods go, the "pill" (taken exactly as prescribed) is probably the most effective, followed very closely by the new injections and IUDs. It should go without saying but proper, careful and consistent use of ANY contraceptive method is the key to effectiveness.