The single most effective tool I have ever used to some form of a contest. Whether it be daily, weekly, or monthly. It causes a drive within the staff no matter how small. Just make sure there is a decent incentive and also make sure to have a focus on "bragging rights." Even your quietest employee will be motivated and it is an excellent time for team building.

People are natural followers, we are hard wired for this. Often times I found myself in this situation of leading even when situations have not had a "need a leader" scenario. Knowledge of your business and product inside and out will be a foundation for you taking this stance as a leader. Become the "go-to" person on numerous topics. A leader is someone who can influence others to not only drink the kool-aid they're serving but in turn, end up brewing the kool-aid themselves. Dive deep into the fine details of your company and speaking about it will become second nature for you. Once you have gained that respect your opinion will become needed and you can influence the staff around you to follow your lead on basically anything. Remember to never be negative in front of people.