Store them in a cool, dry place. Do not stash them continually in a back pocket, wallet or glove compartment because long exposure to air, heat, and light make them more breakable. Do not open a condom packet carelessly. Fingernails, teeth or sharp objects can tear the condom. Check the expiration date.
Old condoms are more prone to break.
Use only water based lubricants, such as K-Y jelly not petroleum jelly or baby oil. Many condoms come pre-lubricated. For pleasure, ease, and effectiveness, both partners should know how to put on the condom. Put on the condom before any genital contact. Use a condom only once.