Hey there!
The best and most effective ways to get into drawing that I've found are as follows:
1) Understanding the hows and whys of your subject (how something moves, the shapes that comprise an object)
2) Drawing everything around you. A LOT.
Very basic advice, but it's really the go-to line from artists for a reason - It works. This little tutorial can help you with the beginning stuff:
http://bit.ly/9z5SXG Solid, quick, easy to understand. Best of all, this is a pretty sweet summation of what actual art students are taught in early foundations classes (well, as far as planning an illustration. Light, movement and form you can pick up from life drawing.)
As for the "draw everything" part, that's really up to how hard you want to progress. Drawing many different things, focusing on a single object, it's all a matter of breaking out of your comfort zone and drawing things you find challenging. If you can't get out and draw people as much as you'd like, grab a mirror or snag one of those Loomis books (A great and sometimes underrated resource for understanding the concepts behind human design).
I wish you the best of luck! Hopefully, once you've gotten some practice in, you'll drop by again and post up some of your work!
