I've been making this baby bib for three years now. I don't know the exact count but I would say I have put together over a 100 of those little guys. I've come up with a few tips and tricks that make the bibs feel more finished and professional.
1. Make sure the fabric strips are parallel. I often mark lines on my pattern so that once I have my strips sewn together, I can line everything up perfectly from side to side.
2. Use a rotary and cutting mat to get accurate cuts. Honestly, I use a rotary every time I sew no matter the project. I have different size rotary cutters depending the project. For the bib pattern, you would want to use a smaller rotarty cutter because of all the curves.
3. Sew slowly and get your curves as perfect as you can. This bib is one curve after another and if you don't get them nice and round, it will all show once your bib is turned to the right side. I repeat, go slow and make nice curves -- it will pay off.
4. Edgestitch right along the edge. For my Bernina sewing machine, I use this presser foot to achieve a perfect edgestitch.
And those are just a few tips to making perfect bibs every time! If you ever have questions, never hesitate to send them my way.