To review turned out mellow and clear, before writing it, make a plan. Highlight the main points you want to cover, arrange the events in chronological order, make notes on those items for which you already have ideas. The plan will help to follow the structure of the narrative, not to forget important details and not to make too many unnecessary digressions.
Write the introduction to the review. In it, you can specify basic information about the speakers group, to tell me what was the reason for your visit (if visiting speakers). Also in the introduction you can write about their expectations before the concert and tell about how they were confirmed or not.
Write everything in detail, preferably in chronological order. Describe the mood that prevailed in the hall before the concert about how the musicians came on stage, they communicated with the audience or just played their set. Separately tell about played songs. Note the ones which caused the greatest response in the audience. If some of them were completely new songs (or, conversely, have not been performed), and be sure to mention about it.
Tell us about concert costumes speakers: they were present or not. Write about how typical it for them. If the concert was a theatrical, or attended by invited guests, in more detail tell about it in my review.
Give a General evaluation to the last concert. Highlight its strengths and weaknesses. Focus on what mistakes were made, how they can be avoided. If you have a interview with the musicians, which they gave before or after the concert, insert the review the most interesting excerpts. If you wish, comment on them. Such remarks will make the review more interesting and meaningful.
Proofread to find and correct errors. Remove the excess, rewrite phrases that are difficult to comprehend. Let me review one of your friends that they pointed out the shortcomings of the material.