To tension your rig you need a "Loos Gauge" and a "system". Just tightening them up 'til they "feel"right isn't good enough.
To beat to windward, or anywhere down around a broad reach, you need tel-tales on your mainsail
leech and your jib luff. There is no "cookie cutter" method to sail trim, each boat and set of conditions are different and change often. Invest in a loos gauge and a weekend sail trim course. You won't believe how much better your boat sails
...and if you've got the cash, new sails
are the best investment you will ever make in your boat!