Check out the Glasgow Guide:
http://www.glasgowguide.co.uk/places.htmlI'm a bit of a Glasgow virgin but would recommend the Kelvingrove museum, the science centre, house for the art lover, burrell collection.
The west end is great for pubs/cafes/restaurants, especially Ashton Lane:
http://www.glasgowguide.co.uk/images_ashton_lane.htmlThere's loads of variety that should suit taste and budget, The Ubiquitous Chip is lovely for a meal, The Lane for drinks, Jinty McGinty's for live music, Brel for all of the above.
For places to stay, I'd just look at the usual suspects of TravelLodges, Premier Inns etc - The Premier Inn at Charing Cross is quoting £177 in total for a 3 night stay in Glasgow in mid-august for 2 people. I'm pretty sure you could get a better deal though.
If you wanted cheap and cheerful try HostelWorld.com, they will have some university halls of residence available to them in August.
Also, if it's August, I'd dedicate one day to hop accross to Edinburgh. The festival is on in August and you really should try, there's loads to do or you could indulge in my favourite activity during the festival in august - get yourself a seat outside a bar on the high street and people watch!