Home Based Jewelry Business

I just took an interest in this and bought a few bits and peices, I have the wires and some clasps and jump rings and earring hooks etc but I cannot figure out if the vital missing peice is crimps?

When , for example I thread an earring I am knotting the end or the wire so the beads dont fall off and then when I get to the top, what do I? I cant tie a knot to the earring hook it look ugly...

I need something so I can loop the wire through the earring hook and then put the clamp thing around the two pieces and squeeze them together... so I dont need to tie a knot...

Gees for something so simple I hope Im not confusing you too much - I know exactly what I mean and I thought it was crimps that I needed but on Ebay most say crimp/spacers instead of just crimp... are crimp and spacers the same thing? I didnt think they were... now I dont know if It was crimps I was after...

What do I need?

Thanks & sorry its so confusing!!!