Let's say you are totally overwhelmed, don't know where to start and need some basic tips – no problem. Did you ever watch the tv show Clean Sweep on TLC? One of my favorite shows ever. We're going to borrow the show's recipe here.
Break it down into manageable chunks. If you're not up for doing a whole room, start with a closet or even a single drawer. As long as you are making small steps, you're working toward the end goal of being more organized.
No matter what you are organizing, step one is clean it out completely. Take everything out of the space. As you remove items sort them into three categories: keep, sell and toss. Ideally you would clean out the space before putting anything back into it. Get out your sorting bins (laundry baskets) and/or garbage bags.
1>> Keep: Ideally this is the smallest pile. Only keep what you know for sure you will use. Do you love it? Can someone else use it? Is it a duplicate? Can you display it? Only keep the best of the best. Remember, there may be something you want to keep but it just needs to be stored some place else.
2>> Sell: A second pile will be anything you think has some value that you can sell.
3>> Toss (or donate): The toss pile should be anything that you know you can't use. Mostly this is something that has no value to you, but maybe someone else can use it.
Once you separate everything out, then you have just given yourself way less to deal with – only the keep stuff. More on keep/sell/toss here on my Pinterest board.