I have hexagon dumbbells in assorted sizes and do the Beach Body/Body Beast DVDs 3x a week. These are my husband's DVDs and
I thought they were just meathead videos (LOL) but they are actually awesome! The man has several other people behind him doing the workout using varying levels of equipment, from bands to dumbbells or barbells so it's pretty inclusive of inexpensive equipment and beginners and why I like it. Before this, I was never into exercise DVDs but they are easy and I feel I get a great workout.
I've been doing weights consistently for years, but I prefer simple moves using my hexagon barbells in 20-30 minutes. The hexagons are very inexpensive and easy to store. You could also just get a Weighlifting for Dummies book and create a simple routine for yourself. I so much prefer working out at home as I used to feel intimidated at the gym, plus I don't enjoy sharing equipment

. Aside from that, you can complete a 20 minute routine easily at your own convenience. It really doesn't take a lot of time, but good form is key. Others mentioned triceps extensions and I agree these are the best for bat wings!!