Complex sentence: Some individuals will choose one path and try to stick with the decision they have made, others will try to maintain both paths, which is often unrealistic, and still others try to maintain one path, but periodically veer onto the other path.
Split into simpler sentences: Some individuals will try to stick with one path and others will try to maintain both paths, which is often unrealistic. Others try to maintain one path, but periodically veer onto the other path.