Whether you are in the process of looking for a new job or happy in your current one it is advised to try and keep your CV as up to date as possible. You never know when you may see a job that you want to apply for even if you are not looking and if the closing date is very soon, the last thing you want is for your CV to be years out of date and miss the closing date whilst you up date it.

If you have taken a training course at work or have learnt to undertake new tasks and responsibilities then add it to your CV when it is fresh in your mind as it will make it a lot easier to tweak when you come to send it out to potential employers.

It is not normally worth updating a cover letter as this really needs to be personalised specifically to the job you are applying for.