Fingerless Mitts are a great, speedy gift. Two patterns that I love are Danyel Pink Designs' Crochet Wrist Warmers...
...and Daphne Bekiari's V-Stitch Fingerless Gloves.
One is crocheted flat and seamed; the other is crocheted in the round. Both are quick and easy and make great last-minute gifts.
Cowls, or infinity scarves, are another great last-minute gift. Just choose your favorite stitch pattern, crochet or knit a flat strip, then seam it up. Or you can knit or crochet in the round. One of my favorite gift cowls is Jane Richmond's Marian Cowl.
I've already knit 5 of these cowls and I don't plan to stop. Big needles and bulky yarn make it a quick and easy knit.
Earwarmers are another great gift. I really like the Valentine Romance Headband.
It is a quick, easy crochet project and is easily jazzed up with some bling. I found these crystals in the jewelry department of the craft store, but you could also crochet some flowers or motifs, add pretty buttons... the options are endless.
Well, I better get back to making my last minute gifts. Hopefully I have inspired you to pull out your hook or your needles and get some gifts together.