RewriteEngine on

RewriteRule ^/my-work$ /work [L,R=301]
RewriteRule ^/notebook$ /blog [L,R=301]
RewriteRule ^/about$ /page/about [L,R=301]
RewriteRule ^/contact$ /page/contact [L,R=301]

RewriteCond $1 !^(images|system|themes|favicon\.ico|robots\.txt|index\.php|sitemap.xml) [NC]
RewriteRule ^(.*)$ /index.php/$1 [L]