There are a few courtesies I've learned since starting Instagram that I would like to share with you today. You can also call it guidelines or etiquette. The last thing we want is to see our followers dwindle just because we unknowingly irked someone. This is what I've learned and what I stick to, but by no means is it set in stone as I've done and still on occasion not stick to the guidelines.
The most important one I learned was not to flood my followers feeds by posting non-stop images all day or say 5 back-to-back and then a few more. I limit myself. On an average day, I'll post one or two pictures only, once in a while you'll see three, and when I'm very inspired I'll post 4, but not back-to-back, spread out over the course of the day. I limit myself not because it's a rule or because I have to, I do it to be courteous to my followers. Also, when you spread out your pictures throughout the day, you'll have a more engaged audience. This does not mean you shouldn't post more then two pictures per day, it's to your own discretion.
Another courtesy tip: I don't tag my images in the caption when I'm uploading my image. I personally love reading the captions as it helps me process the images I see. But when I read a caption that says, 'I'm backing #food #instagram #pretty #styled #cookies #dough' and so on, I'll generally go to the next image. Tagging your images is important if you're looking for new followers or more likes - I highly recommend to do so when building your network on instagram — but be smart about it. What I do is that after I upload my image, I go back to it and tag it in a comment below the caption or after a few people have commented on my image. It accomplishes the same purpose, but leaves you with a clean caption.