Tip: There are many ads on the web claiming huge profits by bidding only $0.02 per each keyword and getting huge CTR, huge conversion rates and huge profits. You wanna know how? i know your answer is YES! There is no big fact in this. But you need to forget about the conventional high cost keywords. Instead, generate your own keywords by your imagination. Here are a few methods:

• Use Keywords with spelling errors. Each key is surrounded by six other keys on the keyboard. All these six keys have equal probability of getting mistyped against a right character. E.g. 's' is surrounded by a,d,w,e,z,x. So, instead of 'soap' anyone can mistype it as aoap, doap, woap, eoap, zoap, xoap etc. this type of misspelling should be considered for all characters in a word.
• You should consider using the local spellings of a keyword/product like bargain price instead of discount etc.
• Consider using abbreviations as CPU, Email etc.
• Alternate spellings: E.g. email and e-mail, t-shirt and tshirt and v-cut t-shirt etc.
• Consider to use opposite words like for cheap cars you may use cars not costlier.
• Using www. and .com as prefix and suffix to certain keywords is also a good idea.
• Now this tip is very important. You should consider using .exe, .zip, .pdf etc. after famous books, softwares etc. Lots and lots are searching products with these extensions just to search. Who knows, if they get what they want free through search engines?
• You may consider using seasonal keywords like for new year, christmas etc.
• keyword as per the event occuring like world cup.