Effective Writing skills are essential for everyone who wish to communicate across boundaries.This skill cannot be obtained in a day,It requires a lot of experience and practice.Strong writing skill will very useful in your business.
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For bloggers and columnists writing skill is a must need one.Its nature that we often tend to make grammar mistakes punctuation and spelling mistakes (Thanks , we have spell check everywhere) but its too nature that correcting one’s mistakes as well.
I have collected some best sites which helps you to enhance your writing skills.
1.Grammar and writing tips
2.Better Writing Tips
3.Writing tips by Wiki
4.50 Writing tools
You can always use Dictionary and Thesaurus for online reference.