Prior to attending an event, know ahead of time what you want to accomplish. Then set yourself a goal. For example at this event I want to collect 5 new business leads or you may want to introduce yourself to someone in particular.
If you connect with someone at an event, swap business cards. Then initiate the next follow up step. Do not wait on them. Then follow through promptly and move the relationship forward by setting up a meeting.
Networking is an every day affair. It is not limited to a particular industry event.
A good networker works at it each day. Common traits of successful networkers are
They are honest
They under promise and over deliver
They communicate frequently and effectively
They concentrate on building positive relationships
The best way to introduce yourself is
Be brief
Be upbeat, smile and make eye contact
Dress and speak professionally
Show you know how to listen
What you should avoid is telling people more than they need to know about your business, instead of discussing ways they can benefit from doing business with you. If the listener does not seem interested by their actions, stop talking about your business. Your business should always be on your mind. Keep a look out for people who can relate to your business.