How can one increase my fiber intake without gas?

If you’re looking to increase your fiber intake, here are a few steps you can take to limit how gassy you may be:
Add fiber-rich foods to your diet gradually. For example, if you eat white bread on a regular basis, try switching to at least one serving of whole grain bread a day for the first week, two servings a day the second week, etc., until all your bread is whole grain. The Academy of Nutrition and Dietetics recommends not to increase total fiber intake by more than five grams each day until desired intake is reached.
Stay hydrated by drinking water. Drinking plenty of water and other unsweetened beverages can help keep stool soft. This allows the fiber to bind and prevents it from hardening. It is also important to avoid carbonated drinks as they can create more gas.
Avoid certain behaviors that cause you to swallow extra air. When we eat, we naturally tend to swallow air as we’re chewing. Chewing slowly, limiting chewing gum and avoiding smoking can help with swallowing less air.
Prepare dried beans by soaking them overnight to make them more digestible. Discard the water the next day, rinse beans under running water, and cook the beans in fresh water. This will help get rid of some oligosaccharides (the sugars that exist in beans that cause flatulence). Rinsing canned beans can also help get rid of some of the oligosaccharides.