How to Insert an Affiliate Link Into a Wordpress Blog

1. After signing up for the affiliate program, (see the links in the resource box for great places to find programs), follow the advertiser's link to 'get links' or 'get html code' or whatever language they use. You need to get the code to insert into the blog. Some advertisers have different ads you can choose, so choose the one that looks like it will fit well in the sidebar of your theme.
2. Highlight, or select the code - all of it, It may be short, it may be as long as a paragraph. Right click on it and 'copy'.

3. Go to your blog and sign in to the wp-admin screen. In the list on the left, select 'appearance', then 'editor'. In the box that appears in the right, look for 'sidebar.php' and click on it. There may be a right or left sidebar (l_ sidebar.php or R_sidebar.php). The code for your sidebar will appear in the middle of the screen.
4. This part is trial and error unless you can really read the code. I usually start at the top and find a spot within the code that looks obvious, like one of the titles, or the first line that shows the header or beginning of the sidebar. Place your cursor at the end of the line, then enter to move it down a line and create a space. Then right click and paste the code there. Now click update and look at your main page to see what it looks like. If the placement is what you like, you're done. If not, go back to wp-admin and use 'cut and paste' to move it around.