Writing from experience is something that anyone can do and you can build on your past knowledge, making your content sparkle with all of the insights and special ways you travelled your lifes path and sometimes it is useful to jot down along the way in the form of a journal that collects some choice thoughts that you feel are important and related to your best experiences that you want to share with your intended audience.
I for one am a great fan of listed thoughts, small snap shot sentences that reflect moments in time, and this list is easy to read back later on to structure your writing and of course these words may prompt you to write in more detail, as a single listed thought can be expanded upon.
Writing from memory is a very useful exercise to try and it gets better every time you start writing, your brain will recollect your thoughts as words and images and it's your job as you are writing to assemble all of that together and form an ordered coherent 4 to 5 paragraphs of written experiences.
Try writing down what you remember in past events and situations to try and perfect this great writing technique.
Read this article which further examines Writing From Experience