Arthritis and affiliate programmes make an odd pairing, and the arthritis writing is by far the better of the two. It is practical in the way people actually need. A walking stick takes a fifth of your body weight off the joints that hurt. Regular massage helps more than most expect. Concentrate on what you can still do with your children rather than on what you cannot.
The affiliate material is standard, though a few sharp points sit inside it. Promote products from more than one merchant, so that a single slow payer cannot stop everything. Tell your readers plainly that you benefit from the links, because finding out later costs you more than the disclosure ever would. Ask an affiliate programme for references and watch how it responds.
There is also a note on trackers and what they reveal about a visitor's route through your site.
Read the arthritis post if it applies to you, and the disclosure advice before you put your first link up.