From looking at previous A2 year 13 blogs:
Many of the blogs contain a huge variety of media embedded devices including Prezi, Piktochart and powerpoint. I have already experienced using these in the past so I should'nt have a problem using them again.
There is also some audience interaction used from questionnaires in blog posts. I think this a great idea and it will most probably be used by myself for my blog when appropiate to do so.
I've also realised that many successful A2 students have consistantly included screenshots several times in their blogs to show evidence, sources and originality. This is another technique to think about using throughout my A2 level year 13 blog!