Step 1 in Organizing:
Sort - items in groups of keep, give-away, throw-away.
Sorting can be more complex if you decide to divide up the Sorting process into additional categories. For example you can sort the KEEP category into the rooms it belongs in or the GIVE-AWAY category into groups of who you will give items to. You may do this if it doesn't overwhelm you for some personalities breaking the three categories into the various groups will be fine but if it begins to feel overwhelming stop and just have the three categories. You can always break each of those categories into groups after you get through sorting by the first three categories. This can take place in the purging process, step 2 of basic organizing.