When using a paint roller on walls, always keep a “wet edge”. Once you start a wall, keep moving until done.
When using dowels, select a size half the thickness of the wood being joined. For example, for 3/4-in. stock, consider 3/8-in. dowels.; for 7/8-in. stock use 7/16-in. dowels. The length inserted should generally be three times its thickness. Thus, a 3/8-in. dowel should be about 2-1/2 in. long to penetrate into each member 1-1/4 in.
On jobs where you don't want to be held up, like felling trees away from home, consider having two chainsaws available. Make sure both are in working order before starting. Then if one needs its chain sharpened, you can use the second one to finish the job. By using two saws any maintenance can be done between, rather than during, the project. Also consider doubling up on other small tools, like pliers and screwdrivers, so they can be kept in different areas to cut down on running from house to garage.