how often can i put a link to my blog?

[gopi]

In my point of view more than 5 quality links per day is good. however, it is good to get a lot of backlinks as much as possible. If you are doing manual backlinking, you won't get penalized for getting lots of backlinks in short period of time since you cannot make that kind of number for manual work.

You may have 2 links per hub to any one domain. A second domain can have another 2 links and so one. An RSS feed counts as 2 links. The domain HubPages dot com is exempted from this rule, as are most true authority sites such as Wikipedia.

Be aware though, that if a large percentage of your hubs all point to the same domain your whole account will be considered as over promotional and unpublished.