Challenges

to try 
You should have a go at something you have always wanted to try.

To stop doing something
Often we try something new, but give up after a few days.

To really try
To achieve your goals you need to make an effort.

Something is done successfully
Things worked out pretty well in the end.

To continue doing something
Maybe you didn't want to keep it up for your whole life, but you can try to do it for 30 days and see if you like it.

to follow an agreement or a rule, by doing what you should do or what you said you would do
Try to keep to a regular timetable of waking and sleeping.

to make something happen
Vivid memories can trigger strong emotions.

The feeling of extreme stress
Social media could trigger anxiety. Sometimes it makes us feel as we are not good enough.

Chances
The odds of his winning the contest are quite good.

A feeling of being not confident, unsure of yourself
I feel very insecure when I have to speak in front of a lot of people.