Multi-pitch rock climbers have the potential to get themselves into many bad situations. Here's a helpful tip for self rescue.
By combining several small items on a carabineer on the back of you're harness you can have the gear needed to reverse several dangerous situations. Here's the items that will clip onto a small locking carabineer.
A small Knife
One 6mm cord to use as a prussik
A small pen light
A small roll of athletic tapeThe knife is for cleaning old sun beaten webbing from rappell stations.
The small pen light is used for inspecting rappell stations at dusk and for finding the descent trail at night. I recommend a full sized headlamp if there is any chance of getting caught in the dark.
The tape is for covering up small cuts and scrapes. It can also be used to close the gate of a non-locking carabineer when rappelling. Use only new carabiners to rappel on.
Remember, multi-pitch rock climbing is an activity with many potential outcomes. To ensure your safety, set yourself up for success. Get the proper instruction, gather the needed information on the route and choose a climb at your ability.