An e-book is basically the original form of a freebie. Although... a whole e-book can be a bit too much (but it doesn't have to be). Maybe you're planning on writing a book anyway - then one of the chapters can be a great freebie for you and your offer.
The term white paper comes from the technical field and is better known there than in the coaching industry, for example. A white paper is a short report or guide that succinctly presents the essence of a complex topic to give readers quick access to it. This also includes user indiatelegram screening descriptions, case studies or market research results.
White papers provide an overview of the advantages and disadvantages, costs and potential savings of a particular problem solution on at least two pages.
The language is kept more technical and sales phrases are often avoided. White papers are now also used in other specialist areas outside of the IT industry.
checklist
Checklists are always popular. They are a helpful tool whenever there are a number of steps to complete a task that must be completed in a specific order. A checklist can also be just a single page - but it makes sense when using it as a freebie to have a matching title page and, of course, information about you and your offer.