Optimise my Google Ad Words campaign for me

Hello :)
A year or two ago I had a guy from here to me an Ad Words campaign.
I am sure it now needs checking and tweeking in order to keep my costs down and be sure I am still targeting the right people for the way my site has changed.
I am also wanting to make my company more sophisticated with a new name and logo coming at some point, so I want to be sure the ads wording reflect that.
I have also had separate keyword research done for my site, since the ads were done, which make now be of use within the Ad Words campaign.
I have conversion tracking etc but I am not sure what to look for and I'm sure they are currently not performing as well as they could do. I believe the structure is ok, but I need the rest checking. This is where you come in :) I would like you to have good feedback but I do not mind which country you are from if you know your stuff. I would also like you to change the bits for me that need changing and give me a little informal report of what you changed and why. Please advise how long you think you will need roughly in your quote.

DETAILS OF CURRENT SET UP FOR YOUR REFERENCE:
I have 3 campaigns.
The first has 2 ad groups, but one is paused (presumably by the guy that did the account when he checked it) and there are 2 out of 6 ads active no doubt for the same reason.
The next campaign has 19 ad groups, 4 of which are active. I have a feeling I might have turned some of those off when my natural SEO started to take effect as I didn't want to pay if I don't have to of course. There are 50 ads of which 6 are active.
The last campaign has 2 ad groups (one currently paused by me) and 6 ads, three of which are active.
I appear to have 1886 keywords used for all of the campaigns reflecting all the various ways of typing each.