A very common stitch in crochet is the single crochet decrease, sometimes known as single crochet 2 together. Whatever you choose to call the stitch, it effectively decreases your stitch count by one since you join two single crochet stitches into one.
Below is a quick photo tutorial on how to work this stitch.
Step 1 to decrease: Insert your hook into the next stitch. Yarn over and pull up a loop. You'll then have 2 loops on your crochet hook. Note: for most projects you'll insert your hook under both loops, but for amigurumi I would suggest working into the front loops only as this will prevent a gap.
Step 2: Again insert your hook into the next stitch. Yarn over and pull up a loop. You'll then have 3 loops on your crochet hook.
Step 3: Yarn over and pull through all 3 loops on your hook to complete the stitch. As you can see below this combines two single crochet stitches into one.
That's all there is to it! So simple! As always, if you have question please comment below or contact Kari by email.