How to organize an event

Hello to all!
I was busy with such a question - “how to organize my event” and after spending a lot of time on the Internet, I did not find an intelligent answer to this question. Of course, I saw answers to some questions, but not all. Therefore, I ask those people who have already organized event'y help me with this.

What I would like to know:

• Location. It seems clear that it is necessary to proceed from the number, etc., as well as what is required, but there are always pitfalls.
• If there is no projector, but you need it - do not buy it? Is it possible to rent it, as other additional equipment.
• Search for speakers. Does the speaker have to pay? I understand that this is a mega influential person, that is necessary, and what is required for people who just want to share their experience?
• Search for sponsors. On the subject of the meeting there are so many products that it is a sin not to promote leading companies from Microsoft to Ubuntu. How to negotiate with them? What are the approximate conditions (at least by the example of Microsoft). What is required and for what contacts to contact them.
• Well, I would also like to hear additional recommendations.

Also I will be glad to hear any recommendations on this issue.
')
PS Since I write to the IT-event blog, I think it is clear that the event is on an IT subject.