Generally you will place activities related to your relationship with the contact on the contact page (e.g. sales activity), and activities relevant to the project on the blog (the business transaction/project) so most often the information that relevant to the matter you are reviewing will be on the page you are looking at. If you need to summarize various journals then you will need to click on the linked item to view it’s own related activities. The best practice here is to model it after the real world: where would that info be recorded in if it was just pen and paper.
We are thinking about optionally presenting activities from other linked items into the view. This of course needs to be carefully designed to be helpful and consistent with other features e.g. publish, placed order, etc, so if you have some ideas drop us a note.