Edit: It has been requested that I merge the information in this sticky with the one here. I have done that, but that sticky still has some very useful information that you might want to look at.
Before making a suggestion
Is your suggestion rejected? https://scratch.mit.edu/discuss/topic/343602/
Is your suggestion a duplicate? Here is some help: https://scratch.mit.edu/discuss/topic/285904/
Make sure what you're suggesting doesn't already exist. If you're unsure, you can ask in the "Questions About Scratch" forum.
Is it a useful suggestion? Will it benefit the Scratch Community? If the cons of the suggestion outweigh the pros then it's probably not a good idea.
Making a suggestion
Title your suggestion clearly. Here are some example titles for someone who wants to suggest Redesigns for Scratch:
This is not a good title, because it is not clear about what your suggestion is. It is also kind of begging the Scratch Team to use your suggestion, which could make you come across as greedy. new suggestion, scratch team plz look
This is better, because it's not “begging” the Scratch Team to use your suggestion, but it's still not clear on your suggestion. My Suggestion
This is a great title, because it is very clear on your suggestion. Redesigns for Scratch
Write your suggestion, as clear as you can.
Think about the pros and cons of the suggestion - and you can list these in your post! It's great to be able to be critical of yourself.
Lists of suggestions are not allowed. To keep the focus on one suggestion, please only put one suggestion per topic. You can read more about that here.
3. Editing and formatting
Is your suggestion clear and concise?
Does it follow the Community Guidelines?
if you are creating a lengthy suggestion, then I would recommend formatting your post with indents, line skips, and other stuff to make it easier to read.
After making a suggestion
People will give you feedback on your suggestion, and tell you their opinion on whether it is useful, and a good thing to be added to Scratch.
If someone suggests something to add to your suggestion, or something to make it better, consider it.
Is it something you like? Is it something that still fits in with your original suggestion?
If it is, then add it to your suggestion.
If you do not like their suggestion or agree with them, don't start an argument. It's okay to disagree! Have a respectful discussion about the suggestion. Discussion is great.
Giving feedback on other suggestions
1. Support (optional)
Indicate your support level for the suggestion. Do you support it? Do you semi support it? Do you not support it?
Make sure to clearly indicate how much you like the suggestion as well as explain why you like or dislike the suggestion.
Other general information
When on the Forums at all times, be respectful and follow the Community Guidelines. Take other's feedback and opinions, and be mindful that not everyone thinks the same thing.
There's your guide to the Suggestions forum!