Suggestions and recommendations

If you're trying to give some recommendations we suggest you to use one of these expressions.

1. When you go out, remember to  
2. I suggest that you 
3. It's not a good idea
4. I would recommend
5. You should
6. To avoid something, consider 
7. I recommend that
8. If you're looking for

You can use verbs in infinitive, present, present continues. For example in the first suggestion it can be: When you go out remember to leave nothing valuable in your room. Or the last one: If you're looking for a cheap lunch takeout sandwiches are a good option. I hope it is well explained.