Clove hitch tying while under a load (what I do):
1. Take stick (or extra stake, chop stick, etc) in right hand, reach over head, place stick parallel and left of cord, wrap upper end of stick around cord (back to right to front), turn stick perpendicular to cord (stick now has a single loop of cord around it); now you can control load with stick in right hand using right thumb on cord
2. With left hand (thumb down), grab cord below stick, turn hand up (thumb up), place loop on left end of stick
3. Tighten your clove hitch
For removal, it's best to use something smooth like extra stake, dowel, chop stick, skewer (?sp).