If you have no use for something then give it to someone else, if you have a use for it then keep it you're self.
This means that if you have no use for something if you don't want to use it if you can't use or won't use or will not use it then give it way but if you have any intention of ever using it for anything atal then keep it.
This does not mean that their is allways someone worse of than you and that therefore it is greedy to keep anything that you're not using even if there is a good chance that you will use it in the future. If one were to hold fast to this concept then one might as well give away all of you're possesions because "theres allways someone who needs them more than you" the only problem with this is that you would instently become the person who needs them more and the person would instantly have to give them back at which p[oint the process would begin again, after doing this for a ten or eleven or so weeks you would both starve to death because giving to the less fortunate is more important than eating and the world will be hell of a lot better of without you.