Everbody likes Drush, why wouldn't you. Anyway I copied cheat sheet from some PDF as this is a drupal dump site and this way I can find it quicker and make also some additions to it.
When available, there is a shorter version of the same command in parentheses.
cache clear (cc) Clear all caches.
cron Run all cron hooks.
Recently I Installed Drush to windows http://drush.ws/drush_windows_installer, scared that it won't work like it should I tried to update some site so I go to local site directory and try pm-update. I get this message
WSOD (white screen of death) can happen in drupal for different reasons. One is that you could be missing some files, probably modules. Maybe you moved something wrong when migrating, or you have wrong git branch or just delete module(s).
Before I talked about some troubleshooting and had some general discussions about caching
http://drupaldump.com/varnish-simple-troubleshooting-defaultvcl
This topic has always been a big pain in the ass for me. Drupal takes a lot of resources, which means money for hosting, you should at least have VPS to have some decent hosting for drupal, but not to have OOMing and high CPU usage all the time, you should use different caching systems.
Boost
So this one is rather old in 2013. But then again Ubercart and E-commerce are slowly getting up to speed with drupal 7 so still many sites use Drupal 6 for web shops. Anyhow, what we wanted to do is add some extra information to emails sent after order. Ubercart has a way of sending nice HTML emails to clients and obscure plain text emails to admins.
In drupal 6, there is a very nice module for flash content. Called Flash node http://drupal.org/project/flashnode which does everything you need for flash files swf (not flv or mp3, you need swf tools for that). But as I have games site I wanted to add unity files to my nodes.
There is a great module for auto tagging nodes with tags/terms for drupal 6, hopefully something similar will be for drupal 7 aswell http://drupal.org/project/autotag
Not sure if this is solved in drupal 7, but in drupal 6 you surely need to override
views-view-summary-unformatted.tpl.php with custom code. More on this you can find here
http://drupal.org/node/403012 but I did my own fork that looks best for my needs and think is the best out of those offered on link above. Here it is
Here is another drupal i18n beast. I have nice taxonomy summary for a category of shops. Which is attachment for a view, which passes term to it to filter category and show only shops that are in that category. Looks nice, it is moderately useful and seems it has never been done before.