Mantra for obstacle remover in Hinduism is dedicated to Ganesha. The mantra should be chanted in the morning hours after sunrise. Here is the mantra for removing obstacles in life.
Om Vighneshwaraya prasada praseeda namo
namah
ॐ विघ्नेश्वराय प्रसाद प्रसीदा नमो नमः
ॐ विघ्नेश्वराय प्रसाद प्रसीदा नमो नमः
The mantra should be chanted 108 times facing the sun.
The mantra should be chanted for 21 days.
Along with the mantra one should help others especially those who are sick. Distributing clothes to poor children is meritorious. It is also beneficial to feed animals including cow, dogs and fishes.
Plant a banana tree and take care of it.