A separate thought; if you are working up to a heavy 5, there's no real reason to be doing 8-12 (or whatever). Do 5s. How much you add to the bar each set depends on how far you have to go. If your "heavy 5" is going to be at 300, don't work up by 10! If it's going to be 100, don't work up by 50s. So a work-up to DL might look like 45/95/135/185/225/245/265/275/etc. Work-up to a shoulder press might look like 45/65/75/85/95/etc.
yeah sorry I should've explained myself a bit better. The Doc's nailed it: start light and work up in 5s.