When you're talking in casual spoken English about things that sometimes happen, you can use the phrase "sometimes I'll ___". For example:

Sometimes I'll go for two or three months without calling or writing to my parents. Other times I'll call them 3 times a week.

Sometimes when I'm watching a really sad movie I'll get really into it and start crying so hard, it's embarrassing.

In addition to "sometimes", you can also say "often times I'll ___" or "I'll always ___".