1. Rib Knit - This is the number one solution I have found for sewing knits. I never sew any knits without it. All knits stretch out on the edges; even knitters have problems with the edges stretching out! Rib knit sucks in the stretched out part.
2. Magic Formula - The magic formula for the length of the rib knit: the rib knit should be 75-85% the length of the knit edge. I wish someone would have told me this when I was starting out!
3. Rotary Cutter and Cutting Mat - I only recently got a rotary cutter and cutting mat, and it has cut my cutting time in half (pun intended)! I used to hate pinning and cutting out fabric especially knit fabric. Knit fabric was so hard to cut out because it stretched out as you cut it and it was hard to get straight lines. Now I cut out quickly and always have really nice lines.
4. Double Needle - The double needle makes knit clothing look manufactured. It's such a great finisher. I cannot live without mine, and I use it all the time! Here is the best article I read for help with a double needle.
5. Elastic - If you're afraid of using rib knit, the next best thing to use is elastic, either regular elastic or fold over elastic. Using regular elastic you'll have to do some sort of casing. Using fold over elastic you can use the magic formula. I have used both of these, and they work great.
Do you have any questions about sewing or about me or this blog? Send them my way and I'll answer!