Buy cotton Jersey fabric

The only drawback is that it is a bit more expensive than a wedge of chalk, but I have had mine for close to 8 years and only had to refill it twice. I always go for yellow since that is the color that will show up well on most fabrics. Once cut, you can dust the extra chalk off.

If I have a really pesky knit that moves a lot, I opt for Plan B.
Yes, that is a silver Sharpie. Traditional? Not so much, but it has saved my butt on a few occasions. Again, I go with silver since I find that it doesn't bleed too much, and shows up on darn near everything I have drawn on it with. If you end up using this method, sometimes the cutting is a little slower, as you want to make sure you cut off all of the marker markings on your fabric. I have used this on a lot of 4-way stretch power meshes, tricots, lightweight knit interfacings, and other super wiggly things.

Cutting

The most important tip I can give is, make sure those scissors are nice and sharp. This will make your cutting go the smoothest. If you're using a rotary cutter, make sure you have a fresh, sharp, drawing-blood-worthy wheel in. I would rank jersey knits the easiest to cut, and meshes with Lycra the hardest. If you are cutting a fabric with Lycra, you may see the Lycra parts of the fabric catch on your scissors if they aren't super sharp. Depending on the percentage of Lycra, the more you can see. A huge peeve of mine is to be cutting and snag the fabric! I also find that I snag heavily on fabrics like shown on the blouse above: sheer silks. If your scissors need a little love, take them down to a knife sharpening shop, and you can usually have them restored to as good as new for around $10.

I hope that was helpful, and again, I'd love to hear and see what you are doing at home. I love learning new tips, especially the unorthodox ones! Back to fiddling with my newest toy, an industrial 5 thread serger.

I feel like I was just handed the keys to a 1957 Cadillac Eldorado Brougham. Now if I can just figure out this 5th chainstitch threading . . .