Managing/Tracking - Frequent, but SMALL Design/DEV Changes

Hello all.

I am having difficulty managing minor changes and small web development/web design tasks.

I a daily basis i will receive calls from multiple clients - asking for lots of small changes, or other work…

I am struggling keeping track of it.
How do you guys keep track of every request?
Is there any forms i can use?
Is there any forms you get them to fill in?
How do you keep track of everything?

The other issue is - communicating effectively what the client has requested - to the developer/designer if i am delegating the task.

What is your process?
Do you use any specific forms?
Do you have any set forms or questions you get the client to fill in each request?

Thanks