So many things. Backed list of games, projects, idea developments, exercise, going outside, going out, housework; and much of them half-finished as well, while at it (see my Steam games list, and how I have that sorted. A good 10+ games started or in progress for over half a year). Damn-near everything really. Sometimes, even including non-backed projects, games, and etc.; sometimes, even eating or sleeping.
I, as a person, am probably one of the worst worst-case procrastinators I know of. I can find almost any reason why I don't progress with just about any task given to me; essentially to the point of concluding with a "Why bother" attitude, rather than "I can do it later" or "Don't have the time/means".
Oddly enough, at times, it does come to decent use, from time to time. For example, I put off doing one task, another task I put off previously will be done many times quicker, efficiently, or detailed, than had I gone through with it regularly; closing to record-time completion.
I have noticed, somewhat, that a majority of my procrastinations do tend to come from being idle (which I hate more than anything else; primarily because I want to do something, somebody calls me in to do some work, gives me an order or an ETA of their arrival, and I sit there waiting, prepared, and they end up a good (several) hour(s) late, and I wasted my day waiting on them, or the next order); another reason is also cause by financial motivation: Can I afford to do it, if no, then put it off until I can afford to (Reason I almost never go out, cook better meals, work on personal projects. Can't afford to.).
I'm hoping this year, things will change, starting with my income; with that settled, then I can take care of other things. Maybe I should be more assertive as well to minimize idleness caused by other people demanding my help only to forget about it (and result in me stalling out), and waste my time in a manner I don't like wasting it. Despite being a time waster myself, I hate wasting time from being idle. It's among one of the biggest pet peeves I have, oddly enough.
ADDENDUM:
Maybe this is also a reason I prefer my freelancing and short-term/part-time jobs over long-term/full-time jobs. More time, better attitude (which also contributes to actually making progress), and so on. In fact, January was probably the most progress I've made in a single month, than half of last year total. Hopefully, I can 'take down the walls of Jericho' again (many months of crap done in a single month), and keep this kind of momentum up this year; especially seeing as this year's resolution is completely dedicated to enjoying life. Naturally, I'll need to work to fund it, but that's a given. I just know how to pace things better at least to minimize idleness this time around.