I often find programmers who open a lot of tabs in Mono. It becomes inefficient if you have too many tabs and you need to click on the Next or Previous buttons to get to the file that you want. You don’t have to do this.
You can use Search > Go to File… or press Alt + Shift + ‘O’ and the type the file that you want to open. I really like this feature and it’s the one that I mostly use. I usually close all tabs and open only those source files that are related to what I’m currently working with.