Navigate to http://genome.ucsc.edu/
If you'd like, you can also load the hub on Jaaved's genome browser: http://jmohamme.genome-mirror.cshl.edu/
Click on the "Genomes" link
Select the "track hubs" button
Select the "My Hub" tab
Enter the following URL into the box and click on "Add Hub"
URL: http://compgen.cshl.edu/mirna/arima/hub/main/hub.txt
For a list of all other hubs, see here
Click on "Use Selected Hubs"
Navigate to the D. melanogaster genome as you usually would. Find the "Lai Lab Hub" section. In this section, all tracks are turned off by default (i.e. the drop-down box has the value "hide"). You can turn on any of the tracks in the "Lai Lab Hub" section and click on any "Refresh" button to see the track.
You're done! You can start browsing