Site slow

Hi,

Our WP/Woocommerce site is sometimes terrible slow.

Loading http://www.flaskeposten.dk/product/dominique-laurent-petit-chablis-2010/ completely might take 12-14 seconds 🙁

Using http://tools.pingdom.com/fpt/, it looks like the problems are:

– it takes forever to connect, this I assume is a hosting problem (i.e. the host not being fast/good enough)

– ??, http://www.flaskeposten.dk/wp-admin/admin-ajax.php?mode=is_user_logged_in
– ??, http://www.flaskeposten.dk/wp-admin/admin-ajax.php
– redirect, http://www.flaskeposten.dk/product/dominique-laurent-bourgogne-cuvee-no-1-2011/1
– html page, http://www.flaskeposten.dk/product/dominique-laurent-bourgogne-cuvee-no-1-2011/1/ (doesn’t exist)

Any ideas for what I can do to fix the last 4 issues?

I know I can enable a caching plugin to make the site faster, but I would really like to fix these problems too.

Thanks,
Mads