What are the practices or methods you use to fatten up your buds? I'm just curious to what others do or use.

Genetics is the only answer. Feeding organic amino acids, fulvic acid or humic acid really boosts plant vitality. Give all 3 and watch out! Don't bother with molasses, it is BS and does basically nothing for your plants directly, the 3 acids I suggested will do 10,000 times more good than any type of sugar water. Plants can only grow flowers as big and dense as their genetics "tells" them, all we as growers can really do is provide adequate light, nutrition and water to guide them into being the healthiest and best example of that particular strain that they can be. A bit like a child really. There is no magic elixir that can make a spindly, poorly growing plant into growing baseball bats so hard you could drive nails into wood, despite what the fertilizer manufacturers would have you believe. It is genetics first and foremost and the ability for that plant to express those genetics is all we as growers can do. Light quality and strength are number one priority when growing indoors. Without adequate light, a plant can not make the amount of energy she needs, through photosynthesis, to grow her biggest and best flowers. This is why it is vital to not remove any healthy green leaves during flowering, this just reduces the plants capacity to make energy and without peak energy production, she can not grow peak quality flowers. Sensible use of a P/K booster will add to flower quality too, but will not make super buds on its own. Adequate, suitable and steady nutrition, followed by adequate hydration with drinking quality water being the final pieces of the puzzle. Adding some soil mycorrhizae before planting in soil will boost plant health and vigour greatly and since using "Mykos" from Xtreme Gardening, I have been converted and can not see myself ever growing without it since my trials a couple of seasons ago. It has been the single most profound ingredient that I have discovered over the last 35+ years of growing, which has produced tangible and quantifiable outcomes and is definitely not "snake oil"! It is getting a bit late to give it to your plants, but I would still be trying some if you are keen. It is a bit pricey, but you don't need a lot and it is worth every single cent. There are similar products out there, "Great White Shark" being another, but Mykos is the only one of its type that I have tried and can honestly recommend based on my experiences with it. I wish you luck and a bountiful harvest! Cheers, Organoman.