A nice tip for new Mac users is to not touch any crucial files that is needed by an application. Why? Here are a few examples:
1) Microsoft Folder in Documents. Whilst people like to organise folders themselves, a few folders, such as this one, should not be touched. This is because Microsoft Office needs to locate the files here in order to work and moving it will cause problems for the application.
2) Sometimes you’ll find files that appear from nowhere with strange extensions. Don’t just delete these because they look suspicious, google them as sometimes, little important files like to unhide themselves.
3) I would say this is the most important rule as a lot of people make this mistake and a lot of the time it can be very costly. Do not ever, under any circumstance, organise the iPhoto library from within Finder. (The Mac equivalent of Windows Explorer) Always adjust your files from within iPhoto unless they’re referenced in their original location. Editing the file names etc. can mess up the way iPhoto works and may lead to you having to start from scratch. If you need to access a photo export it from iPhoto or you can locate it from the iPhoto library and COPY it. Just leave the original file.
The 3rd mistake is a very common one made so I hope that this post will help clarify that unless it’s something you created yourself and know what programs rely on it, DON’T TOUCH IT!