by Michael Halper for HubSpot Welcome to "The Pipeline" — a weekly column from HubSpot, featuring actionable advice and insight from real sales leaders. A significant portion of the B2B prospecting calls you make will end up going to voicemail — making the sales voicemail techniques you leverage and how well you can execute them absolutely crucial to your sales efforts. But getting there isn't always straightforward — being able to routinely leave well-constructed, effective sales voicemails can elude even the sharpest reps. So to help ensure your voicemails are airtight and adept, I've put together a list of eight tips that…