Here are some of the most important lessons I picked up in my first year of sewing. This isn't an exhaustive list, but these are some of the things that I struggled with or that confused me at first. These tips and tricks should help a beginner who is just learning to sew.
Make your own high-waisted jeans / pants using this sewing pattern. It has a button fly. It comes in US 0 - 18 women's sizes. This post also has 48+ other sewing patterns for pants. A great source of inspiration for clothes sewing project ideas.
Here's my roundup of 31 FREE sewing patterns for tops. All of the patterns are printable PDF's. If you're interested in DIY fashion, this is full of irresistable freebies! I've included women's tops in different styles, sizes, and fabrics. From crop tops to tunics, you'll find a good variety here.