render more one collection in one page using express and mongodb

dears am new at mongodb and express and trying to make a simple website let say home page and about , contact , albums, blogs. so i made a collections for the above and now my issue is in home page which it will contain slider, welcome paragraph, 3 images from albums, and 3 blogs from blogs so my code was like below but i feel it is wrong can you help me please to render more than one collection in same page but in best practis way .

my code like

var Slider = require('../models/slider');
var About  = require('../models/about');
var Hours  = require('../models/hours');
/* GET home page. */

router.get('/', function(req, res, next) {
   Slider.find(function(err, sliderimages) {
       About.find(function(err, homeabout){
           Hours.find(function(err, workinghours) {`enter code here`
               var openinghours ='';
               for(var i=0 ;i < workinghours.length ; i++){
                   openinghours = workinghours[i];
                   openinghours.Sat.startHour == 'Closed' ? openinghours.Sat.startHour =  null :  '';
                   openinghours.Sun.startHour == 'Closed' ? openinghours.Sun.startHour =  null :  '';
                   openinghours.Mon.startHour == 'Closed' ? openinghours.Mon.startHour =  null :  '';
                   openinghours.Tus.startHour == 'Closed' ? openinghours.Tus.startHour =  null :  '';
                   openinghours.Wed.startHour == 'Closed' ? openinghours.Wed.startHour =  null :  '';
                   openinghours.Thu.startHour == 'Closed' ? openinghours.Thu.startHour =  null :  '';
                   openinghours.Fri.startHour == 'Closed' ? openinghours.Fri.startHour =  null :  '';
                   openinghours.Sat.startHour == 'Closed' ? openinghours.Sat.startHour =  null :  '';

               }
               res.render('index', { title: 'Express',sliderimages:sliderimages , homeabout: homeabout, openinghours: openinghours});
           });
       });
   });
});

via Ali Al Roomi