Because I extensively use the new Inbox by Gmail, and it's feature to bundle certain emails in my inbox once a day/week, but I also still use the standard Gmail, I like to see what's really in my useable inbox (that's not in one of these bundles) by this search:has:nouserlabels  in:inboxIs there any way to get a link to this simple search as an option in my label list on the left, or even to replace the Inbox option with this one?
Add an artificial label in the Gmail label list?
gmail;gmail filters;gmail labels;gmail search;inbox by gmail
Yes, there is a way. Enable the Quick links Lab, and add to it the URL of your Gmail search.To add the Quick links lab, do the followingGo to Settings (cog wheel) > SettingsClick on the Labs tabSearch for Quick linksClick the related Enable radio buttonClick on the Save changes button.Once the Quick links is enabled it will be available in the left panel. If you have Chat or Hangouts enable, you should click the ... button to display the side panel gadgets.The Quick Links has ha button +/- to expand/collapse it.To add a link, If the Quick links gadget is collapsed, click the + button to expand itClick the Add quick link link.A popup will be displayed. Add the URL to your Gmail searchClick the OK button.