Difference among 一些，一点，有些，有的
Basically,
"一些" -> "some"
"一点" -> "a little", often use with uncountable nouns.
"有些", short for "有一些", can mean "have some" or "there are/is some" (You know in Chinese "own sth." and "sth. exist" using the same word "有").
It is the same with "有点".

The hard part is, do you need "有" in your sentence? 

Here are some examples:


有些事情群众能做，我们领导干部不能做。——江泽民
There are some things that the crowd is Okay to do, while the officers should not. by Jiang Zemin, former president of China
这一点非常重要，但是有些同志还没有重视起来。——江泽民
It is very important, but (there are) some officers (are) not paying attention to it. by Jiang Zemin, former president of China


In sentences above, "有些" can be replaced by "一些".  However, the way President Jiang said it is more natural, following the habit of Chinese language.


我吃了一些面条。
I ate some noodles.


In this sentence, "一些" cannot be substitute by "有些" cause we already have verb "吃了" here.