If you use Apollo to get leads from LinkedIn profiles, download the Apollo chrome extension. That way you can go on LinkedIn and just press the sidebar that pops up. It will let you get their email in a few clicks without having to go into Apollo.io and keep switching tabs back and forth. Another time save is to hook up Apollo and HubSpot for free so you don't have to manually copy contacts from one to the other. It will automatically upload them to HubSpot as you add new people to your Apollo list.