I used to be TERRIBLE at this, but I started a habit that has helped me to this day. If I've been in a room and I'm leaving it with no immediate intention to do something important, can I put something out of place away? For example, right now there is a bag of cookies that I was eating for breakfast on the coffee table. The next time I go into the kitchen, I can take that bag of cookies in. At the end of the day, I usually walk through the apartment and kind of do a quick pick up: clothing, remotes put away, dishes that have escaped the kitchen put in the sink, any trash put in a trash can, etc. It does go a long way to making it easier to get started on your deep cleaning if you're not decluttering just to be able to clean.