Hey Karin thanks for your questions. For non-negotiables;
1. Get your on-page SEO done right. Download a complete pdf guide from here
2. Start writing quality content on your website's blog twice every month. Focus your content on providing value to your readers not selling your products. It's okay to mention your products and link to them in your post but don't over do it. Keep your blog post's length at 800 words or more. The more content value packed the better.