If you want your website to look professional, these ten tips could help you a lot:
1. Navigation is the key.
2. Content is still king.
3. Use text and graphics appropriately.
4. Test your site using different browsers.
5. Make sure there are no broken links on your site.
6. Make sure there are no typographical or grammatical errors on your site.
7. Consistency in design is important.
8. Use multimedia elements sparingly.
9. Keep individual pages short.
Hope useful to you!