How do you organise your paper work/ mail ?

whether you sit down at a desk or just sort through your mail as it arrives, how do you keep it organised into things to do, things to pay, appointments to make or keep ect ?

I have a set of three plastic bins or duckets underneath one of my kitchen counters, the purpose was for each of my family members to have a place to keep or store their mail ect, however it never caught on and they have been there a year.

Now its just a dumping ground for bank statements and important bits and pieces that dont have a home as such, i just want them off my bench tops.

Can you make any suggestions please ?