Think of something you would like to make. Now is a great time to get started on Christmas presents. Most people don't like to knit big heavy afghans in the hot summer. Smaller projects are preferred. But if you have air conditioning, why not? One thing I like to do every now and then is just scout out all the free patterns on the internet and get some inspiration. Here is a great website that has lots of advice for beginners and links to free patterns for knitters:
http://knitting.about.com/od/learntoknit/a/begin_knit.htm
And here are some of my own favorite free knitting pattern sites, when I feel like window-shopping:
http://www.knittingpatterncentral.com/directory.php
http://www.lionbrand.com/content-knittingPatternIndex.html
http://www.straw.com/cpy/free_pattern_yarnssort.html
http://www.dailyknitter.com/patterns.html
http://www.knittingonthenet.com/ (She used to be the leader of the about.com knitting site and has written a dummies book for knitters)
http://www.craftown.com/knit.htm
Maybe you would like to tackle a sweater for yourself. Or learn to make a few dishcloths in a cotton worsted. How about a couple of scarves for friends for presents. Golf club covers? Something nice for your house? Go to your craft store or Wal-mart and look at the yarn. See what you like and what colors turn you on. You need some inspiration, then it will all flow!
Good luck!