Board presentations have a typical setting. The audience is usually relatively small and consists mainly of insiders in the company. Usually, Board papers get send around a few days before the actual meeting. Board members are experienced executives with busy schedules that want to make decisions and get to the point. They will not hesitate to urge you to move on when they think they got the message. (A big difference from a conference presentation where the audience can either walk out or check email on their mobile device if the presentation is not interesting).
The basis of the Board meeting material is usually a large slide deck full of facts and analysis. The most important recommendation is to put that aside as the basis for your presentation. Strategy documents are highly structured, highly organized, highly detailed, and exhaustive. As a result, they contain too much information, do not get to the point fast enough, and are frankly boring. This is great if you want to solve a problem, it is not effective if you want to communicate the solution.
Start off with thinking about what you want your Board to decide. Board meetings are all about decisions, not about fact sharing without a purpose. Set up the agenda, and put the decisions you want taken right upfront. The presentation challenge is now how to convince the Board that your suggested decisions are the right ones.
Every Board presentation usually has a few slides that form the stage for the group discussion. Anticipate what these slides should be and spend most of your effort on these ones. Key slides are usually those that map the possible options and shows the key trade-off that is required to chose the best one. Often, I use a heat map in these situations. A heat map is a simple table with the options as columns, and criteria on the rows. You can color the cells of the table with green, orange, or red to make the trade-off visible. Another way to show trade-offs is to plot your strategic options on some sort of 2x2 matrix, or show yourself on a 2x2 matrix now, and where you want to be in the future versus competitors.