Guest Blogging and Forum Posting are also plays a very big role of driving traffic and getting well-reputed backlinks.

if you buy backlinks this way do you not get penalized by google

content is kind in SEO. should promote quality content first. Social Media, classifieds and form posting are good techniques to increase in traffic and ranking.

High pr bookmark,forum and article submission

You can promote your website/ webpage on social platforms for SMO. Start generating high quality backlinks from high PR sites for ranking purposes. Get to work on the SEO.

Forum posting is a good suggestion. Frequent blog posts are also good.

that is very true and if you have it it will definitely led to drive the traffic

To get traffic for a site do SMO and also do off page activities like Bookmarking, blog commenting, forum posting...

1st: Through Organic Way
2nd: Through Social Media
3rd: Fake using some tool
no other option

You five best ways to bring traffic to your site is

1. Try to optimize your content for SEO so you get massive traffic from search engines like Google Yahoo and Bing (VERY IMPORTANT)
2. Forums should be seen as a medium to ask questions and get answers... Do leave quality and relevant reply to the topic after reading the post and replies... Only then people will be more convinced to know more about you and your site...
3. Make sure you submit your site to social bookmarking websites like Stumble Upon, Reddit and Digg it can bring a lot of traffic to your site instantly... But follow the rule of 90/10.. Share 90% posts of other site and 10% of yours.
4. Leave quality and relevant reply in blogs coming under your niche... Instead of putting your site address below the comment... Add relevant link to words using anchor tags... (IMPORTANT TO KNOW HTML)... This will make it feel less spamy and relevant.
5. Make use of social networking sites effectively... Joins various groups on Facebook related to your niche and share your posts in there... Never share a single post multiple on a group or even on your own wall...

IMPORTANT: DO NOT BUY LINKS OR TRAFFIC... YOU'LL GET BANNED

search engine is obviously number one type of traffic but it takes a long time to rank high on google!

SEO procedure is to get top position of your site in search engine.

Update your website with latest update. Make your website attractive and Do SEO by using white hand SEO. Promote your website on social sites. It will help you.

Just write a good content. Search engines will grant you with traffic for that.

Try to use SEO techniques on your site.
Article Submission
Social Bookmarking
Directory Submission
Forum Posting
Blog Commenting
Link Building
After complete these steps you will automatically get traffic on your site.