First up, select the right size Friend for the crack.
Where possible, place the Friend so that the stem is aligned in the direction of any possible fall – Wild Country Friends come with flexible stems that bend when you weight them.
Release the trigger to allow the lobes to open out and make contact with the sides.
Friends are pretty easy to place and remove with just one hand.
Once you get the hang of it, a well-placed Friend in solid rock can be, generally speaking, just as strong as a bolt.