You can generate the conversions scripts when you click 'Conversions' under 'Tools and analysis' in the top menu of the AdWords interface. You insert this script on the page that is loaded after visitors have filled in and submitted the form.

With other targeting methods I mean methods that don't use keywords, such as targeting certain interest categories.

First of all increasing your budget will only make sense when you are reaching your daily budget sometimes now and it is limiting your number of impressions and clicks. If you are not reaching your daily budget at the moment, but you'd like to increase your impressions and clicks then you should look into new potential keywords that can be added to the campaign (or use other targeting methods for display campaigns).

Since your goal is to generate leads with your campaign it is important that you start tracking how many leads your campaign generates and at what cost. You can use a conversion script from AdWords to track the number of form submissions.

I think it is important to get insight in the performance of your campaign at the moment, before you decide whether to increase your spend or not.

Hi Paul,

Reciprocal linking is more something that can devaluate external links. When it comes to internal linking this isn't really a problem. You can definitely include that link when you think it's benificial to your visitors.

Good one. You can also check if there's a specific (set of) pages that have been visited with this browser and if there are specific dates where traffic peaked.

Agreed. Think it's most important that your internal linking makes your site as user friendly as possible. Sites that have obviously only placed internal links for search engines can be very annoying.

As far as I know a nofollow link will not give any link value. Regardless the site it's on.

I don't think forcing will help. Sending a friendly message maybe will. If not I'm afraid you'll have to wait a bit longer.