Sometimes, you're riding your bike and night comes over. What will you do? Don't take unnecessary risks, prepare your bike to night rides for a few Euros/Dollars/Pounds/Yens/_______ (Other).
Step 1: Step 1: Think Where Cars' Lights Point At
Yeah, in the lower bike zones.
Step 2: Step 2: Front and Rear Lights
Front light must point about 3 or 4 metres forward. If your election has few light positions, a blinking one makes you more visible because differences you from a streetlamp ;), and keeps the batteries' life a bit longer.
Rear light must be in a horizontal line, over the rear wheel. Make sure there aren't obstacles between the light and your bike's back (for example the pannier rack or a long coat).
Step 3: Step 3: Reflection Items: Pedals
Could happens that pedal hole is bigger than reflector's nuts. Don't panic, take some washers and put'em between pedal and nuts and... trouble solved.
Step 4: Step 4: Reflection Items: Frame
Sometimes comes as a gift in sport magazines, or big events. Cut it carefully, and take off the metal inside (careful because could cut a finger in less than a second). Once you have 2 parts, glue it in the rear frames' fork.
If you want to keep your frame untouchable, fix it with electric tape.