NoScript and Adblock serve different purposes.
Noscript blocks javascript and XSS attacks. Adblock blocks known ads from
loading in your browsing. Use both. Also, use Adblock edge, since Adblock
Plus has an anti feature (allow some ads by default).
You can complement Adblock with adblock pop-up.
As for encryption, it's really up to you, and what are youd "threat model"
and "defensive strategy". You can encrypt only single files if you so wish,
or you can try to encrypt an entire partition. Keep in mind that usually the
more encryption you add, the less "usable and fast" your system becomes.
One thing I would like to do but don't know how is a script to run rkhunter
and chkrootkit, and give me a "warnings only log". It could be a script that
searched for warning lines and placed them all inside the same text file. If
run everytime on boot, one could be more "on top" of his system's protection.