Here are some collections for bloggers from my pas blogger experience:

1. Adjust Right Sidebar margin width

Sometimes, the space between main body posts section and right side bar is too wide. You may want to change it from 40px to 10 px. Here is the code I found from here:

#sidebar-right-1{
position: relative;
left: 40px !important;
}

Add the code to Blogger Them Designer – Advanced – Add CSS section as show below.

blogger_right_bar_margin.png?resize=800%2C634&ssl=1blogger_right_bar_margin.png?resize=800%2C634&ssl=1

2. Add youtube Playlist into blogger

2.1 Generate html code from your youtube playlist

Youtube_playlist_share.png?resize=800%2C554&ssl=1Youtube_playlist_share.png?resize=800%2C554&ssl=1
Youtube_playlist_share_embeded_code.png?resize=800%2C386&ssl=1Youtube_playlist_share_embeded_code.png?resize=800%2C386&ssl=1

2.2 Add html code into your Blogger layout
It is best to put code between <center> and </center> to get better center location in your page.

Youtube_playlist_share_embeded_code_in_blogger.png?resize=570%2C573&ssl=1Youtube_playlist_share_embeded_code_in_blogger.png?resize=570%2C573&ssl=1

<center><iframe width=”560″ height=”315″ src=”https://www.youtube.com/embed/videoseries?list=PLg7bL1bMpwPXUwb-BsLKolf42uWa0_nfY” frameborder=”0″ allowfullscreen></iframe></center>

References: