One of the easiest ways to become better at presentation design is to have a calm and relaxing work environment and an ergonomic chair and computer setup. I have not found the idea chair solution yet. Simple kneeling chairs put too much pressure on your knees after long use, complicated ergonomic chairs are so huge that they seem to come straight out of a science fiction movie. Maybe this simple elegant solution, the Tip Ton by Vitra might be a good solution to put next to my regular office chair (nice commercial by the way), it will be launched later this month.
SlideMagic: a platform for magical presentations. Free student plan available.