How do you keep track of your earnings?

I have been doing this type of stuff for years now. I was one of the first people to get involved with Perk back when it paid amazingly. Now that I have experience under my belt..I want to keep track of my earnings from each app/website..writing it down the way I have been is confusing.

I am all about being organized but might need some help in properly tracking everything so I know how much per week/month I am earning and from which app/website.

If you can help me find a way to do this it would be much appreciated.