If you have to some handouts or documents to provide to your audience, try to use high quality paper for this. When using high quality thick paper, you will notice that your audience will think that the also the content is of higher quality.
When you use thin paper it is seen as more flimsy, less quality. If it is a document that needs to be kept / used for a longer period you may be able to use nice glossy thick paper or plasticized paper. This will last much longer and the likelihood of your audience to keep it and use it for a longer period is higher.
