Most achievements in this game are easy to obtain so I will not write about those. There's only one thing you need to know, if you find a good spot to farm an achievment you can save before performing an action and reload after you do it, repeat it and reaload again. This way you can get most achievements really quickly out of the way. For example you can dring a bottle of amber, reload and repeat that as many times as you need to get My Precious achievement.