It is simple dude. First you must find a good project that you will participated in bounty campaign. In the thread that are describing about everything about the bounty campaign and project like whitepaper, spreadsheet that you can find out the participants and stakes that you will get for calculating for your payment. And then read all the rules and the requirements that listed on the thread. You might set your signature into what the project described in the text box, just copied it to ypur signature and start to posting with the project signature was set in every your post. Don't forget to check the spreadsheet everytime.