4. This is kind of a subset of number 3 above,– lack of adequate planning. I.E – What is purpose of your webpage – is it to sell them right there or perhaps gather their information for further use?

5. People don't either set up their website to collect names and leads (email list) or they just collect everyone's name in one big box. For example if you have several categories of interest on your site try to collect person's name tied to their specific point of interest.

6. Over Targeting – I see this problem all time. People have a small website and they try to over target every keyword remotely associated with their website on each individual page. Each individual webpage should be targeted as much as possible. A variation of this is people try to optimize their sales page for good search engine ranking. A much better approach is optimized pages, which direct people to their sales page.

7. And of course they do a any number of things that are not friendly with search engines. (Here are just a few examples)

Like using frame pages incorrectly.

You are hosting your Web site at a free Web space provider.

Your Web site has a low link popularity.

Bonus Tip: When requesting links from other websites vary linking text (title) you provide them, so that linking text coming to your site isn't always same. Think of it like this, in nature you would have a variance of linking texts. So if you do what is more natural, you should rank better with search engines.

6. How to know whether your newly uploaded page is listed on search engines? Type; allinurl:yourhome.com/uploaded.html or site:yourhome.com/uploaded.html in Google.
For AltaVista, Yahoo! Search, MSN, Excite and Northern Light, use url instead of allinurl. But unlike Google, you may have to place http:// in front of domain name in other search engines. For AllTheWeb and Lycos (for AllTheWeb results only) use url.all, and for Inktomi originurl.
If you don't see any result or see something like "... did not match any documents", try again placing "www" in front of domain. Both result can be different. If both results fail to show matching page, it means that page is not listed yet.

7. How to make SERPS show only in certain web site? Suppose you want to see pages includes exact keyword phrase "internet marketing blog" within a certain web site, you can achieve this by typing "internet marketing blog" site:anyhome.com in Google, Yahoo! Search, MSN, Excite and Netscape. For Altavista, use host instead of site, for AlltheWeb and Lycos use url.host and for Inktomi domain. You may use this tip to figure out what your competitor is doing with this keywords.

8. How to know how many pages of your sites are listed? The search tip 7 can be extended for this purpose. That is, type: yourhome site:yourhome.com in Google. This shows all indexed pages in yourhome.com because all your pages include "yourhome". For other search engines use appropriate search command, for example, host instead of site in Altavista.

9. How to know which web sites linked your site? You may wonder which web sites are linking to your site. To find out which web sites and how many, type; link:yourhome.com in Google, Yahoo! Search, and Altavista. But you may have to place http:// in front of domain name for search engines other than Google. For Inktomi use linkdomain instead of link and for AlltheWeb use link.all.

10. How to know when search engine crawled your site? One way to know this is to see log file on your server. But what if you want to check how often 'spider' crawl your competitor's site?

Every search engine spider takes a snapshot of web sites when it visited. And it records date when it takes a snapshot. Because of this you can know when spider crawled your site or your competitor's site. Type search command explained in search tip no. 8, for example, yourhome site:yourhome.com, and then you'll see SERPs listing your web pages. In result page, you'll see "Cached" or "Cached Page" link for each page. Choose one of them, click it and then you'll be leaded to snapshot of that page. Around top, you may find date when it was took and that's date when spider crawled your site.

Now you have ten search tips. Some of them you already knew and some of them you might not recognize. Hope you find some tips that are of help.