There are plenty of places to find interesting topics:
Interesting dissertation topics for auditing can be difficult to come up with without broadening the topic to accounting as well. One topic could be just auditing itself. Others could be accounting methods, online accounting, and bookkeeping.
A simple tool could be anything from a hammer to an axe.
There are lots of interesting and current topics, but you should choose one that interests you. I could tell you what interests me, but there is no reason why you and I would necessarily be interested in the same things.
Of course you could, you can do anything. There might just be some interesting results :)
The dug a hole to see if they could find anything interesting in the ground.
A brief story about an interesting incident could be about anything. This may be at work, home, in the shopping malls or anywhere else where something interesting happened and you narrate it inform of a story.
Interest in any subject is purely a personal matter. Certainly some topics are more popular than others but what may be fascinating to one person could be a matter of complete indifference to someone else.
You could talk about future travel plans, a new hobby or interest you both could explore together, or deeper personal topics like goals and aspirations. Each of these could lead to meaningful and engaging conversations with your girlfriend.
A visit to the zoo mainly involves looking at animals, so you could tell us what animals you looked at and what you observed, how interesting it was and why it was interesting, or possibly why it wasn't interesting, and anything else that happened at the zoo that might interest your reader.
A preset of beliefs could alter a way a person can communicate freely. When someone is really religious or has strong beliefs about anything it could leave them with bias on certain topics.
For instance that ordinary, everyday things can be the subject of interesting artworks.
interesting, superb, great, overall basically anything positive could be a character trait for letters from rifka