How do you handle investors?

[Bruce M.]

***Mods I'm sorry if this is the wrong area, if so, please redirect***

Hey Guys,

I am starting to get people approach me about investing in my business. There are some who want to invest a substantial amount i.e $100,000 but there are other investors who want to invest as little as $3,000 to $5,000. I have several questions.
1. How do you usually structure your deals with private investors/what do you promise them?
2. Do you structure the deal differently when dealing with a small investment?
3. What steps do you take to keep track of the investments/profits of each investor? 

I know this is a very broad question but if more info is needed to answer then please ask away.