Logs and Exponents BOB

Logarithms and Exponents... is the most difficult unit in all of math history! When we can make both sides have the same base, how does that make it equal? When we were doing the base 'e' stuff... when do I use 'ln' instead of 'log'? Then we got to the word problems... Holeh camolly... We got so many different formulas. I don't even know when to use which formula. On the sheet he gave us on Friday, number two, I just did not get that stuff. Like writing an equation with the data given to you... I just do not know.