We've all had problems with slow queries, which can lead to sluggish applications and dissatisfied users. You've looked at your code and just can't figure out what's causing the problem. Have you looked at the effectiveness of your MySQL queries? Here's an easy way to analyze your queries to make sure they are being executed efficiently.

Here's a very simplistic example. Let's start out by creating a table of NFL teams.

So a sample record would look like this:

We're going to start out with a simple query. Let's try:

Our results:

Simple enough, right? Now the question is...is this query as efficient as it could be?

MySQL's EXPLAIN syntax shows how queries are being executed. Is the query correctly using indexes...is it utilizing indexes at all?

Let's try running EXPLAIN on the previous query:

The result of the EXPLAIN query is below:

So, what does this tell us?

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In my first part of the Google Adsense introduction I talked about ad placement, ad blending and the importance of understanding the Adsense program policies. I just want to stress it one more time...make sure you play by the Adsense rules. If you try to push the envelope, you may make a decent amount of money in the short term, but in the long run you're just hurting yourself. If you violate the Google Adsense TOS, you're account will eventually get banned. So just play it safe and the profits will come. Be patient, monitor your advertising campaign and optimize it accordingly.

Ok, let's continue where we left off. You've chosen your ad format, your ad color scheme and you've integrated the ads into you website. Now you can just sit back and watch the money come rolling it. WRONG! It would be nice if it we're that simple, but it's not. Adsense tracking is very important, you must monitor your ads and make adjustments to those that aren't performing well. Luckily for us Adsense makes it easy to monitor ad performance via Channels. There are two types of reporting channels, URL and Custom.

URL channels allow you to track ad performance across a whole site, a specific page and even a specific directory. You can enable URL channels without modifying the actual Adsense code.

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Please note, these are not my websites or tools, just some of my favorite SEO and webmaster tools that I use on a regular basis. I'll be posting more in the future

• Check your backlinks and anchor text

• Strongest subpages tool :: finds the top 30 strongest subpages from your domain and show which sites are linking to them

• Deep link ratio analysis :: Find the deep link ratio for the top 10 search engine results for a search phrase.

• Backlink Watch :: It will show you "anchor" text, pagerank, total outbound links on that page, and nofollow flag for each of your inbound link available.

• Keyword Density :: Analyzes your meta tags and keywords within your webpage suggests the keywords you should be using

• "Dig" Pagerank :: A cool little tool that will check your websites pagerank in 700+ datacenter

• Keyword Tracker : Keyword and backlink tracker. Show's daily, weekly and monthly fluctuation of your keywords. Also features custom charts and backlink tracker (free, requires a login)

• Pagerank Prediction :: Mostly for fun. It "predicts" your future Google Pagerank.

• Pagestrength Tool :: Check your Page Strength, which looks at a variety of factors...Age of domain, backlinks, domain name visibity, etc

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Please keep in mind that this is only based on personal experience and each sites success will vary depending on the content, placement, integration, traffic, etc. This is a very basic overview geared towards first time "Adsensers".

Before you even think about getting Adsense up and running on your site, I highly recommend reading over the Google Adsense Program Policies. Be sure to not only read them, but understand them because you don't want to risk having your account banned.

Some of the most important (and basic) policies to remember are:

• DO NOT click your own ads.
• DO NOT alter the Adsense code in any way.
• DO NOT encourage users to click on your ads. The only text that can be used to label your ads are "Sponsored Links" or "Advertisements"
• DO NOT try to inflate your page impressions.
• Up to 3 ads may be displayed per page
• Adsense can only be placed on "content" pages. DO NOT place ads on registration pages, user profile pages, etc.
• You may have one, and only one, Adsense account

Ok, now that you've read over the policies it's time to start setting up Adsense for your website.

Choosing the right format

From my experience these are the Adsense formats that have performed best for me:

• 336 x 280 large rectangle
• 300 X 250 medium rectangle
• 468 X 15 horizontal ad links

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