Es versus Esta
I am level 14 Spanish but I am still having a hard time telling the difference between when to use "es" versus "esta". What is the actual difference?
Basically ser is used for things that are characteristic of something and estar is used for things that are temporary, but I'm sure you've already heard that.
This link may be helpful :) - http://spanish.about.com/cs/verbs/a/servsestar.htm. And there are other articles linked to on that page that could help you.
There are a few things that you just have to memorize which one uses ser and which one uses estar. For example, occupations use "ser". There's a list of those here: http://www.spanishdict.com/answers/100040/ser-vs.-estar
I'm not really sure where you're at with your understanding, so I may just be feeding you things you already know, but I sure hope this helps!
I've always found that estar is used for more temporary conditions and ser is more for identities. Like if you were to say "Estas bonita" then you'd mean that this person looked beautiful today, but if you said "eres bonita" you'd be saying "you're beautiful" like it's a characteristic of them. I could be wrong, as there are never hard and fast rules for any languages (yay irregulars) but I've found it's a good set of guidelines to use in most situations.