When Simón gets really worked up we swaddle him, though it is getting to be necessary fewer times a day than at first. I also swaddle him at night cause he startles in his sleep a lot and jerks his arms around, waking himself up. But if he's swaddled he sleeps for longer stretches of time. Honestly, swaddling saved our sanity in the first week as a way to soothe him, but now we are adding more variety to our soothing techniques. I have two light weight swaddling blankets, hand me downs from my cousin's son that I like to use mostly. We also have a sleep sack with panels that velcro around him that can also be used, but the fabric feels super synthetic, so I only use it when I'm totally bleary-eyed. Funny thing is that the commercial swaddling sack has "back is best" printed across the chest, but we always sleep him on his side.